tag:blogger.com,1999:blog-183220562017-02-21T11:31:37.759-04:00Homeschool Math BlogMath teaching ideas, links, worksheets, reviews, articles, news, Math Mammoth stuff, and more - anything that helps YOU to teach math. ~ Maria MillerMath Mammothhttps://plus.google.com/105961364219775463476noreply@blogger.comBlogger1015125tag:blogger.com,1999:blog-18322056.post-85127153326590119682017-01-14T13:48:00.002-04:002017-01-14T13:48:38.701-04:00Math Mammoth January saleJANUARY SALE at <a href="http://www.mathmammoth.com/" target="_blank">www.mathmammoth.com</a> !<br /><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://1.bp.blogspot.com/-cmD7z3U9J5E/WHpka63T5XI/AAAAAAAABfc/QwYtea2iya4NqUJrH6cJ0Lny2D2pUgXEwCLcB/s1600/MathMammoth-Square-Logo800x800.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="https://1.bp.blogspot.com/-cmD7z3U9J5E/WHpka63T5XI/AAAAAAAABfc/QwYtea2iya4NqUJrH6cJ0Lny2D2pUgXEwCLcB/s320/MathMammoth-Square-Logo800x800.png" width="320" /></a></div><br /><br /> Get 25% off of all of Math Mammoth CD and downloadable products at <a href="http://mathmammoth.com/" target="_blank">MathMammoth.com.</a> Use coupon code <b>JAN25. </b><br /><br />The offer is valid till January 25, 2017.Math Mammothhttps://plus.google.com/105961364219775463476noreply@blogger.com0tag:blogger.com,1999:blog-18322056.post-51147679593253003632017-01-10T22:07:00.002-04:002017-01-10T22:07:15.174-04:00Tips for mental mathHow about some <a href="http://www.mathmammoth.com/lessons/practical_tips_mental_math.php">practical tips for mental math</a>?<br /><br /><br /><div class="separator" style="clear: both; text-align: center;"><a href="http://www.mathmammoth.com/lessons/practical_tips_mental_math.php" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="214" src="https://1.bp.blogspot.com/-vHSVh780Z0k/WHWTH3rll6I/AAAAAAAABfM/ZVVCqk33Q_ga4JIiwSoq9OBbGgydvL9cQCLcB/s320/mentalmathpages-s.jpg" width="320" /></a></div><br />Please share this article on your FB page or other social media (assuming you like it), because I feel it can benefit all kinds of people, not just moms and dads and teachers. :)Math Mammothhttps://plus.google.com/105961364219775463476noreply@blogger.com0tag:blogger.com,1999:blog-18322056.post-52328240800712928352017-01-05T15:41:00.002-04:002017-01-05T15:41:36.525-04:00Printed books sale!<br /><div class="separator" style="clear: both; text-align: center;"><a href="http://www.rainbowresource.com/prodlist.php?subject=Mathematics/10&category=Math+Mammoth/9820" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="230" src="https://2.bp.blogspot.com/-t0awXVtkbYc/WG6hQF3z4OI/AAAAAAAABe8/5TQkg9cGpfUcSamOJnskd5v-PtPGy3RiACLcB/s400/MM%2Bsale%2BRainbow.png" width="400" /></a></div><br /><br /><br />Get Math Mammoth printed books and CDs at 20% off -- at <a href="http://www.rainbowresource.com/prodlist.php?subject=Mathematics/10&category=Math+Mammoth/9820">Rainbow Resource Center</a>!<br /><br />The sale lasts till 1/12/2017.<br /><br />Math Mammothhttps://plus.google.com/105961364219775463476noreply@blogger.com0tag:blogger.com,1999:blog-18322056.post-50005861351818347562017-01-01T21:53:00.001-04:002017-01-01T21:53:07.188-04:002017 Mathematics GameYeah! <a href="https://denisegaskins.com/2017/01/01/2017-mathematics-game/">2017 Mathematics Game</a> is here!<br /><br />If you don't know what it is, it's a number "game" or challenge where you build each of the numbers from 1 to 100 using the digits 2, 0, 1, and 7 -- and you HAVE to use all those digits!<br /><br />For example:<br /><br />10 = 2 + 0 + 1 + 7<br /><br />8 = 2 x 0 + 1 + 7<br /><br />7 = 2 x 0 + 1 x 7<br /><br />...and so on. I'm sure you get the gist!<br /><br />Read the complete rules for this game <a href="https://denisegaskins.com/2017/01/01/2017-mathematics-game/">here</a>.<br />Math Mammothhttps://plus.google.com/105961364219775463476noreply@blogger.com0tag:blogger.com,1999:blog-18322056.post-14401429662932822792016-12-01T20:19:00.004-04:002016-12-01T20:19:26.758-04:00Meaning of factors in multiplication: four groups of 2, or 4 taken two times?Someone asked me about the interpretation or meaning of the two numbers in multiplication, such as 4 × 2. Do you view it as <b>four groups of 2</b>, <u>or</u> as <b>four, taken two times</b>?<br /><br />Here's their question:<br /><br /><blockquote class="tr_bq">"...I noticed that your explanation about how to interpret a math phrase, such as 4 × 2, is different from how I have understood it and taught it to my older daughter who was using RightStart Math at this level.<br /><br />Let me explain: I see that you are using the first factor to denote number of groups and the second factor tells how many are in each group (4 × 2 would be interpreted 4 groups of 2). On the other hand, I have taught and thought of it reversed, with the first factor telling how many are in each group and the second factor telling you how many groups (4 × 2 would be 4 taken 2 times). I know that the difference in explanations does not ultimately change the product, but I am wondering what you thoughts are. When I conceptually picture what I'm doing I see it as 4 taken 2 times and I feel a little dyslexic trying to see it the other way." </blockquote><br />Here's my response:<br /><br />I'll try to briefly explain the main reason for teaching multiplication that way.<br /><br />It is because then it becomes easier to tie the concept of multiplication in with OTHER CONCEPTS coming up in the next grades.<br /><br />Later, students will study <u>multiplication with fractions and decimals</u>, and ultimately with percentages. When we transition to fractions, we see calculations such as 1/2 × 7. I teach students to think of it as "half of seven", in essence <b>"translating" the multiplication sign into "of"</b>. It matches the notion of 5 × 7 meaning five groups of seven.<br /><br />Then when we get to decimals and, most importantly, percentages, we will have 0.3 × 50 which is the same as 30% × 50, or 30% of 50. Notice the word "<b>of</b>" once again. In other words, 30% of 50 is equal to 0.3 × 50. This last idea is of paramount importance for students in algebra, so that they can write algebraic equations for problems involving percentages... for example, to solve for the initial or final price when a discount percentage is known.<br /><br />One quick example of the above... A gadget was discounted by 45% and now its price is $67.38. What was the original price? We can write the equation 0.55<i>p</i> = 67.38 and solve it in a snap. The expression 0.55<i>p</i> means 55% OF the original price.<br /><br />So that is why, in 3rd grade, I teach children to view 5 × 7 as five groups OF seven instead of five, taken seven times. I'm trying to make it easier for them to understand<b> <span style="color: #990000;">(1) fraction multiplication,</span> <span style="color: #351c75;">(2) percentages,</span> and <span style="color: #38761d;">(3) algebra.</span></b><br /><br />Hope this helps!<br /><br />Math Mammothhttps://plus.google.com/105961364219775463476noreply@blogger.com0tag:blogger.com,1999:blog-18322056.post-16494772751273619092016-11-18T18:16:00.002-04:002016-11-19T14:00:12.040-04:00Math Mammoth Thanksgiving sale<b>Get <span style="color: red;">25%</span></b> off of all <a href="http://www.mathmammoth.com/">Math Mammoth</a> & <a href="http://www.mathmammoth.com/worksheets/mirl/" target="_blank">Make It Real Learning</a> products sold at MathMammoth.com site. :) <br /><br />Use the coupon code <b>THANKSGIVING</b>. <br /><br />The offer is valid till December 1, 2016. <br /><br /><a href="http://www.mathmammoth.com/books.php" style="background-color: #ffe87c; border-radius: 10px; border: 3px solid white; color: #222222; padding: 6px; width: 170px;">Start shopping ></a><br /><br /><br /><div class="separator" style="clear: both; text-align: center;"><a href="http://www.mathmammoth.com/books.php" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="126" src="https://3.bp.blogspot.com/-_TK5uwZgdY4/WC99gc7A2uI/AAAAAAAABeY/cWBAcYm_tkMluMHDEFhfI5YoAxxUa5ORACLcB/s400/allbooks-display1-tp-s.gif" width="400" /></a></div><br />Math Mammothhttps://plus.google.com/105961364219775463476noreply@blogger.com0tag:blogger.com,1999:blog-18322056.post-86465230146569865342016-11-16T09:50:00.005-04:002016-11-16T09:50:39.829-04:00Thanksgiving Activity Pack<div class="separator" style="clear: both; text-align: center;"><a href="http://www.currclick.com/product/102199/Childrens-Best-101-Thanksgiving-Activity-Pack" imageanchor="1" style="clear: right; float: right; margin-bottom: 1em; margin-left: 1em;"><img border="0" height="320" src="https://1.bp.blogspot.com/-SOI9WmNOuyE/WCxj865buaI/AAAAAAAABeE/34wK8T2NC5AhnUhpgAlkZEcbs4SRTltggCLcB/s320/102199.jpg" width="247" /></a></div>My daughter Abby (11 years) recently created a <a href="http://www.currclick.com/product/102199/Childrens-Best-101-Thanksgiving-Activity-Pack">Thanksgiving activity book</a> filled with 101 different activities - <b>dot-to-dots, copy-the-pictures, various types of matching activities, coloring pages, mazes, trace-the-dots, color by numbers</b>, and much more! It is intended for children ages 4-8.<br /><br />You will find it <a href="http://www.currclick.com/product/102199/Childrens-Best-101-Thanksgiving-Activity-Pack">at Currclick</a>.<br /><br /><br /><br />Math Mammothhttps://plus.google.com/105961364219775463476noreply@blogger.com0tag:blogger.com,1999:blog-18322056.post-41610462681099165292016-11-10T13:51:00.001-04:002016-11-10T13:51:10.480-04:00More practice with bar models and problem solvingSomeone asked me about the <b>BAR MODELS</b> in the problem solving lessons in Math Mammoth grade 5.<br /><br />This person said that they had just completed every problem in the lesson Problem Solving with Bar Models 1, but her son is still having a hard time knowing how to make the bar model after reading the problem, and knowing what to do with the fractional part once it is figured out.<br /><br /><a href="http://www.mathplayground.com/thinkingblocks.html" imageanchor="1"><img border="0" height="150" src="https://3.bp.blogspot.com/-X7haKtSSK08/WCSym95D1kI/AAAAAAAABd0/4ogXcp34NJEQRvnBpO4JAhKFpmS1z4l0wCLcB/s200/browser_ad_multiplication_320x240.png" style="clear: right; float: right; margin-bottom: 1em; margin-left: 1em;" width="200" /></a> She was wondering if there was <b>something else for supplemental practice</b>, and if she should look for mastery in this area at this point.<br /><br /><u>MY ANSWER</u>:<br /><br />I feel it would be good to achieve some degree of mastery at this point (in 5th grade). I suggest using <a href="http://www.mathplayground.com/thinkingblocks.html">the website <b>Thinking Blocks</b></a> for additional practice, in particular the "Multiplication and Division" and "Fractions" subsections.<br /><br /><a href="http://www.mathplayground.com/thinkingblocks.html" imageanchor="1"><img border="0" height="150" src="https://1.bp.blogspot.com/-N4DRNjtfsdY/WCSymslOwBI/AAAAAAAABdw/6JEIAo-Dt0IQMTBPliSDLSUjzhUYJKxtwCLcB/s200/browser_ad_fractions_320x240.png" style="clear: right; float: right; margin-bottom: 1em; margin-left: 1em;" width="200" /></a> <br /><br />Also, if the problem solving lessons are difficult, consider <b>spreading out the study of these lessons</b> in Math Mammoth by starting the child simultaneously on the next chapter. For example, one could study problem solving every other day, and the next chapter every other day. That way, if it's spread out to a longer period of time, the student's brain has more time to "mull it over". :)<br /><br />I hope this advice helps the person who asked -- and maybe some of you others out there also!<br /><br /><br />Math Mammothhttps://plus.google.com/105961364219775463476noreply@blogger.com0tag:blogger.com,1999:blog-18322056.post-22316606299028690372016-11-03T20:44:00.002-04:002016-11-03T20:44:45.527-04:00Teaching the multiplication tablesIt's probably that time when many are <a href="http://www.mathmammoth.com/lessons/multiplication_tables.php" target="_blank">teaching the multiplication tables</a> to their children or students. <img border="0" src="https://2.bp.blogspot.com/-cUsV9ucqF5M/WBvZuUZK_5I/AAAAAAAABdg/oQ8bUfpJTsIkP1ehw_kLf_zmkkPmWsKUACLcB/s1600/smiley-s.png" width="25" /><br /><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://4.bp.blogspot.com/-vLQ-EuMtyrU/WBvZocwXSkI/AAAAAAAABdc/7KrRBjzijU0BF9GSUTke1OVr6mBMKNncQCLcB/s1600/multiplication_table-s.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="157" src="https://4.bp.blogspot.com/-vLQ-EuMtyrU/WBvZocwXSkI/AAAAAAAABdc/7KrRBjzijU0BF9GSUTke1OVr6mBMKNncQCLcB/s320/multiplication_table-s.jpg" width="320" /></a></div><div align="center"></div><br />Check out <a href="http://www.mathmammoth.com/lessons/multiplication_tables.php" target="_blank">my guide of how to teach them</a>.<br /><br />And here's a link to videos that do the "structural" (not totally random) drill for you: <br /><br /><a href="http://www.mathmammoth.com/videos/multiplication_tables.php" target="_blank">Multiplication tables videos </a> — presented in a specific order — easiest ones first — which makes learning them MUCH easier. Math Mammothhttps://plus.google.com/105961364219775463476noreply@blogger.com0tag:blogger.com,1999:blog-18322056.post-10532548704287916102016-10-25T18:01:00.000-04:002016-10-25T18:01:02.529-04:00Quilting and math - patterns!Mathematics has been called the science of patterns, and here's another field that is all about patterns: <b>QUILTING.</b> Fascinating patterns and lots of eye candy!<br /><br /><br /><div class="separator" style="clear: both; text-align: center;"><a href="http://mathhombre.blogspot.com/2016/08/quilt-show.html" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://1.bp.blogspot.com/-527k_4bFYS4/WA_VxXBGohI/AAAAAAAABdE/FOR9_vqIuxYe59EAQyLE2f-tq7WJlUDKQCLcB/s1600/Screenshot%2Bquilts.jpg" /></a></div><br />Go check out this math teacher's take on a <a href="http://mathhombre.blogspot.com/2016/08/quilt-show.html">visit to a quilt show</a> with tons of beautiful pictures. Enjoy!Math Mammothhttps://plus.google.com/105961364219775463476noreply@blogger.com0tag:blogger.com,1999:blog-18322056.post-75170651205059382982016-10-24T09:47:00.000-04:002016-10-24T09:47:12.452-04:00Number senseA <a href="https://www.youcubed.org/what-is-number-sense/">short video on NUMBER SENSE</a> - the ability to work flexibly with numbers.<br /><br /><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://www.youcubed.org/what-is-number-sense/" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="1" height="223" src="https://3.bp.blogspot.com/-Lf12T_pMEb0/WA4QnPz9cPI/AAAAAAAABc0/Tqpgw-zyn6kFi_va6XrbvpioBShJDSMLwCLcB/s400/Screenshot.jpg" width="400" /></a></div><br />We want to encourage this with our children! The example she uses is a multiplication problem, but developing number sense starts earlier, with addition. For example, you can encourage your students/children to solve 8 + 9 using several different strategies, such as:<br /><br />- 9-trick: The nine wants to become ten, so it takes one from the eight. Thinking this way, 8 + 9 becomes 7 + 10 which is an easier problem.<br /><br />- doubles: 8 + 9 is really close to 8 + 8. If the child remembers that 8 + 8 = 16, then 8 + 9 is just one more.<br /><br />- Similarly, 8 + 9 is just one less than 9 + 9.<br /><br />The same type of strategies can then be used in solving more complex addition problems. But the most important thing in this is that number sense has been proven to predict a student's success in algebra.<br /><br />Check out <a href="https://www.youcubed.org/what-is-number-sense/">Jo's video here</a>. <br /><br />Math Mammothhttps://plus.google.com/105961364219775463476noreply@blogger.com0tag:blogger.com,1999:blog-18322056.post-21105656851278850672016-10-22T15:22:00.001-04:002016-10-22T15:22:02.904-04:00Angle theorems reference pageI found a neat reference page about the <a href="http://www.transum.org/software/SW/Angle_Theorems/">important angle theorems</a>, with visuals AND interactive versions: <br /><br /><div class="separator" style="clear: both; text-align: center;"><a href="http://www.transum.org/software/SW/Angle_Theorems/" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="284" src="https://2.bp.blogspot.com/-z7GMIatUxLY/WAu8HpnTPiI/AAAAAAAABck/BlYVbwov7yYcs4igyaMfbOI0FVjvtMoHACLcB/s400/screenshot-www.transum.org%2B2016-10-22%2B13-19-09.png" width="400" /></a></div><br />Includes for example such basics as angles around a point add up to 360 degrees; vertical angles are equal; corresponding angles are equal; and results about the angle sum of a triangle, a quadrilateral, polygons; plus a few more.<br /><br />Go check it out! I feel not only teachers, but students also might enjoy browsing through the page. Math Mammothhttps://plus.google.com/105961364219775463476noreply@blogger.com0tag:blogger.com,1999:blog-18322056.post-67227169053901341882016-10-17T16:14:00.003-04:002016-10-17T16:14:54.603-04:00In my roomReading the news day after day in these times can be so troubling... I love this peaceful song and the thoughts in it... <br /><br /><div align="center"><iframe allowfullscreen="" frameborder="0" height="281" src="https://www.youtube-nocookie.com/embed/0QMRynsATC8?rel=0" width="500"></iframe></div>Math Mammothhttps://plus.google.com/105961364219775463476noreply@blogger.com0tag:blogger.com,1999:blog-18322056.post-10812495248717798352016-10-12T15:46:00.003-04:002016-10-12T15:46:42.716-04:00Video lessons for 6th gradeAny 6th graders?<br /><br /><div class="separator" style="clear: both; text-align: center;"><a href="http://www.mathmammoth.com/videos/grade_6/6th-grade-videos.php" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="225" src="https://4.bp.blogspot.com/-0Tn-htPFjow/V_6SxOJegdI/AAAAAAAABcU/ejVNsrrGFQU4scQEoK6ow9Lbsrugd2HVQCLcB/s400/screenshot-inequalities-video.jpg" width="400" /></a></div><br />Here's a handy index or <a href="http://www.mathmammoth.com/videos/grade_6/6th-grade-videos.php">list of my video lessons specifically meant for 6th grade</a>. You'll find topics such as percent, decimals, ratios, statistics, beginning algebra topics, and more.<br /><br />Math Mammothhttps://plus.google.com/105961364219775463476noreply@blogger.com0tag:blogger.com,1999:blog-18322056.post-80063724476593429832016-09-29T12:02:00.002-04:002016-09-29T12:02:46.675-04:00A visual tool to illustrate fraction multiplicationThis <a href="http://www.dadsworksheets.com/fraction-calculator.html">tool allows you to VISUALIZE fraction multiplication</a> ...and other fraction operations, but I think it's especially useful for fraction <u>multiplication</u>.<br /><br /><div class="separator" style="clear: both; text-align: center;"><a href="http://www.dadsworksheets.com/fraction-calculator.html" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="265" src="https://3.bp.blogspot.com/-PzgJUMYgdGY/V-06xyetriI/AAAAAAAABcA/AYFXCKpl6yQWkNUZsu0XLBxBbtpAdyIyQCLcB/s400/screenshot-www.dadsworksheets.com%2B2016-09-29%2B09-44-11.png" width="400" /></a></div><br />Many students (and adults!) miss the notion that conceptually, we can think of fraction multiplication this way:<br /><br />1/2 × 3/4 can be seen as HALF of 3/4... which is 3/8.<br /><br />Or, 5/6 × 1 1/2 can be thought of as 5/6 OF 1 1/2 , which is 1 1/4. <br /><br />This interpretation (called "<b>scaling</b>") gives a very simple meaning to this operation, and it is especially important because it EXTENDS to decimals and percentages:<br /><br />You see, 1/2 × 3/4 can be written as 50% of 3/4 = 50% × 3/4 = 0.5 × 3/4 = 0.5 × 0.25.<br /><br />Or, 5/6 × 1 1/2 becomes (about) 83% of 1 1/2. Or maybe you turn it around and get 1 1/2 × 5/6 = 150% of 5/6. Being able to think FLEXIBLY of fractions/decimals/percentages really helps you (and your students) find all kinds of tie-ins with real-world situations.Math Mammothhttps://plus.google.com/105961364219775463476noreply@blogger.com0tag:blogger.com,1999:blog-18322056.post-91301802911595691692016-09-26T11:19:00.001-04:002016-09-26T11:19:25.170-04:00Make It Real math workbooks<a href="http://www.mathmammoth.com/worksheets/mirl/">Make It Real Learning products</a> are back at MathMammoth.com! <br /><br /><div class="separator" style="clear: both; text-align: center;"><a href="http://www.mathmammoth.com/worksheets/mirl/arithmetic_1.php" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="https://3.bp.blogspot.com/-GfMCv_xZn2A/V-k6zgUTI9I/AAAAAAAABbs/S6P0uaRKDZY-pEDZEs1Em9HyMpRfJe1DwCLcB/s320/mirl-arithmetic-1.jpg" width="248" /></a></div><br />Make It Real Learning workbooks each concentrate answering the question, "When am I ever going to use this?" The workbooks contain activities or problem situations taken from real-life, with real data. Some examples of the situations are: cell phone plans, autism, population growth, cooking, borrowing money, credit cards, life spans, music downloads, etc. etc.<br /><br /><div class="separator" style="clear: both; text-align: center;"><a href="http://www.mathmammoth.com/worksheets/mirl/sets_probability_statistics_1.php" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="https://3.bp.blogspot.com/-aoQv716_T_4/V-k60Utb0fI/AAAAAAAABbw/_zwliXAGg_IqeT_GSuc_38-ZMp5tN1ICwCLcB/s320/mirl-sets-probability-statistics-1.jpg" width="248" /></a></div><br />As students work through the problems, they can use the math skills and concepts they have learned in their math curriculum (such as the concept of average or graphing), and apply those to a situation from real-life.<br /><br />=> <a href="http://www.mathmammoth.com/worksheets/mirl/">Read more here</a> <br /><br /> Check out also the FREE samples and try the activities with your students:<br /><br /><div style="background-color: lightgreen; color: black; padding: 10px;"><a href="http://www.mathmammoth.com/preview/MIRL_Volume_1_Activity_Sampler.pdf">Samples from Activity Library, Volume I</a><br /><a href="http://www.mathmammoth.com/preview/MIRL_Volume_2_Activity_Sampler.pdf">Samples from Activity Library, Volume II</a><br /><a href="http://www.mathmammoth.com/preview/MIRL_States_North_Dakota.pdf">Sample of States by the Numbers series: North Dakota</a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="http://www.mathmammoth.com/worksheets/mirl/fractions_percents_decimals_1.php" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="https://3.bp.blogspot.com/-fFXdZQxHxBI/V-k6z3qU9QI/AAAAAAAABbo/8SUCpZrvCtM7zhzJUNR5EUleVTctzcf3wCLcB/s320/mirl-fractions-percents-decimals-1.jpg" width="243" /></a></div>Math Mammothhttps://plus.google.com/105961364219775463476noreply@blogger.com0tag:blogger.com,1999:blog-18322056.post-17427325500588549232016-09-22T17:51:00.004-04:002016-09-22T17:51:31.796-04:00Free video lessons for decimal arithmeticDecimals, decimals, decimals... math curricula spend a LOT of time with decimals in grades 4-6. And yes, a lot of it is necessary.<br /><br />But perhaps your child can grasp the concepts quicker with <a href="http://www.mathmammoth.com/videos/decimals/decimals_lessons.php">these videos</a>, and then be able to progress faster and easier. Decimal division in particular can be a stumbling block.<br /><br /><div class="separator" style="clear: both; text-align: center;"><a href="http://www.mathmammoth.com/videos/decimals/decimals_lessons.php" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="225" src="https://4.bp.blogspot.com/-8u_ZM8MijkI/V-RR2Rzrx0I/AAAAAAAABbQ/_S1riX3JybArAurbN_RpzPYeWcUL9HQAACLcB/s400/multiplying_decimals_by_decimals_part2.jpg" width="400" /></a></div><br /><br />So, check out my <a href="http://www.mathmammoth.com/videos/decimals/decimals_lessons.php">new videos</a> and bookmark the page for later use!Math Mammothhttps://plus.google.com/105961364219775463476noreply@blogger.com0tag:blogger.com,1999:blog-18322056.post-10593257264852784892016-09-19T09:52:00.000-04:002016-09-19T09:52:05.842-04:00Substitutions for the word "very" + adjectiveI know this is off-topic but I enjoyed glancing through it and it might very well benefit and be of interest to your students... so here goes. :)<br /><br />It's a <a href="http://www.proofreadingservices.com/pages/very" target="_blank">list of 128 adjectives</a> you can use instead of "very" and some weak adjective, and comes from a company that does professional proofreading:<br /><br /><div style="text-align: center;"><a href="http://www.proofreadingservices.com/pages/very"><img alt="128 Words to Use Instead of Very" height="1650" src="https://cdn.shopify.com/s/files/1/0213/5010/files/128_Words_to_Use_Instead_of_Very_Infographic_V22_FINAL_491KB.jpg?16887633742132601790" width="550" /></a> </div>Math Mammothhttps://plus.google.com/105961364219775463476noreply@blogger.com0tag:blogger.com,1999:blog-18322056.post-82740296987554377262016-09-18T23:07:00.002-04:002016-09-18T23:07:48.280-04:00Visual tool - find all the factors of a number <a href="http://www.dadsworksheets.com/factoring-calculator.html" imageanchor="1" style="clear: right; float: right; margin-bottom: 1em; margin-left: 1em;"><img border="0" height="320" src="https://4.bp.blogspot.com/-UbRn5goP1uQ/V99WWq5Z3OI/AAAAAAAABbA/ZaJeHrvw-ZoSLOYtQrAjheNAGm4hSWybACLcB/s320/factoring-calculator.jpg" width="216" /></a>Here's a nice factoring calculator that lists <a href="http://www.dadsworksheets.com/factoring-calculator.html">all the factors of a given number</a> and also gives a neat VISUAL that pairs the factors. You could use it to show your children/students some examples, and then of course let them PLAY with it! :)<br /><br />See for example <a href="http://www.dadsworksheets.com/factoring-calculator.html#72">factors of 72</a>, And all the factors of <a href="http://www.dadsworksheets.com/factoring-calculator.html#708900">this large number</a>.<br /><br />Personally, I think it could be improved by listing the factors in order from 1 to the number itself, so that the pairing will then show how the largest and the smallest factors are paired, then the 2nd largest with the 2nd smallest, and so on. Neat anyway!<br /><br />Math Mammothhttps://plus.google.com/105961364219775463476noreply@blogger.com0tag:blogger.com,1999:blog-18322056.post-22839799377935429592016-09-16T12:42:00.001-04:002016-09-16T12:42:11.385-04:00Probability gamesHere's a REALLY NEAT <a href="http://www.stats.govt.nz/tools_and_services/schools_corner/activities/interactive-games.aspx">collection of interactive activities & games for basic probability concepts</a>. Great for middle school!<br /><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://www3.stats.govt.nz/games/Dice-duels-airport-addition/index.html" imageanchor="1" style="margin-left: 1em; margin-right: 1em;" title="Dice duels airport game"><img border="0" height="277" src="https://2.bp.blogspot.com/-3Zbi0DdcxGA/V9wgYJg5YNI/AAAAAAAABaw/r4oxG6x3IW4ActvgtZKw-A2VODfTcg6NACLcB/s400/dice-game.jpg" width="400" /></a></div><br /><br /><br />For example, you get to experiment what happens to the probability distribution when a die is biased. Just roll the die 100s or 1000s of times at one push of a button and see the distribution. In another activity you need to figure out IF a die is biased or not.<br /><br />Then the collection includes games that are based on the probabilities of obtaining different sums or differences with two dice. <br /><br />Or, you get to fix a match box machine that is producing too much variation in the number of matches per box. First you take lots of samples and analyze the situation using boxplots, and then you adjust the machine. That's how things are actually done in real-life quality control.<br /><br /> Here's the link again: <a href="http://www.stats.govt.nz/tools_and_services/schools_corner/activities/interactive-games.aspx">Interactive probability games</a>. Check it out!Math Mammothhttps://plus.google.com/105961364219775463476noreply@blogger.com0tag:blogger.com,1999:blog-18322056.post-43838256885549680782016-09-13T16:33:00.000-04:002016-09-13T16:33:00.581-04:00FREE Algebra 1 curriculum onlineI stumbled upon a site that has a complete <a href="http://www.onemathematicalcat.org/algebra_book/online_problems/table_of_contents.htm">ALGEBRA 1 curriculum with interactive online exercises</a> - all free!<br /><br /><div class="separator" style="clear: both; text-align: center;"><a href="hhttp://www.onemathematicalcat.org/algebra_book/online_problems/table_of_contents.htm" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="194" src="https://2.bp.blogspot.com/-D5pg_9Ttt3Y/V9hiFKqxS6I/AAAAAAAABaY/3paE9qbnEio8U3lNwhhYRql57k1-zoaZgCLcB/s320/screenshot-www.onemathematicalcat.org.png" width="320" /></a></div><br />I also added that link to my page that lists <a href="http://www.mathmammoth.com/complete/algebra_1.php">video websites and online curricula for algebra 1</a>.<br /><br />I highly recommend you take a look at some of the <a href="http://www.mathmammoth.com/complete/algebra_1.php#videos">sites with VIDEOS</a> for your high school students! <br /><br />In today's world, ANYONE can learn math by using videos - and there are lots of them, so if one teacher's explanations don't quite click, then watch some more from other people - getting a bit wider perspective usually helps. :)<br /><br />Math Mammothhttps://plus.google.com/105961364219775463476noreply@blogger.com0tag:blogger.com,1999:blog-18322056.post-49527257100688118222016-09-07T15:29:00.001-04:002016-09-07T15:29:16.818-04:00Sale on Math Mammoth printed books!<div class="separator" style="clear: both; text-align: center;"><a href="http://www.rainbowresource.com/prodlist.php?subject=Mathematics/10&category=Math+Mammoth/9820" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="179" src="https://4.bp.blogspot.com/-MJTSLQgP53s/V9BqZY_3wqI/AAAAAAAABaI/Boa_L5h1zdwfY_55_wNl3VAChY86sLhvwCLcB/s320/MMsaleSEPT-1473198528.jpg" width="320" /></a></div><br /><br /><br />Math Mammoth printed books are <a href="http://www.rainbowresource.com/prodlist.php?subject=Mathematics/10&category=Math+Mammoth/9820">on sale at Rainbow Resource Center</a>! Get them now at 20% off! The sale lasts till September 15.<br /><br /><br />Math Mammothhttps://plus.google.com/105961364219775463476noreply@blogger.com0tag:blogger.com,1999:blog-18322056.post-77418468049965230482016-08-28T22:19:00.001-04:002016-08-28T22:19:15.250-04:00Kenken puzzles for mental math and logical thinking<div class="separator" style="clear: both; text-align: center;"><a href="http://www.kenkenpuzzle.com/play_now" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="320" src="https://2.bp.blogspot.com/-xwMJyJhiw_Q/V8ObZvFeFmI/AAAAAAAABZ0/5-c2l4C2kvwc_8Dln-_2oAndQ780KQ__gCLcB/s320/screenshot-www%2Bkenkenpuzzle%2Bcom%2B2016-08-28%2B20-01-35.png" width="318" /></a></div><br />Here's another fun idea to get a bit of mental math into the math lessons in early grades... play KenKen puzzles! (And they are really neat logical thinking puzzles for any "grade" or age - I enjoy them too!)<br /><br />You can <a href="http://www.kenkenpuzzle.com/play_now">play Kenken online here</a> - options include the puzzle size, operations to use, and difficulty level.<br /><br />The image above shows a 5x5 <i>solved</i> Kenken puzzle that uses all four operations. <br /><br />You might also check the offer for free weekly KenKen puzzles that <a href="https://denisegaskins.com/2016/08/19/kenken-classroom-puzzles-start-next-week/">Denise mentions</a>.<br /><br />Math Mammothhttps://plus.google.com/105961364219775463476noreply@blogger.com0tag:blogger.com,1999:blog-18322056.post-3840684051504239092016-08-27T14:33:00.001-04:002016-08-27T14:33:38.805-04:00"Brainie" game for some mental math - 2nd through 6th gradeCheck how your 2nd-6th grader might like this game titled "<a href="http://www.mathplayground.com/brainie.html">Brainie</a>" for a bit of <b>mental math</b> at the start (or end) of the day:<br /><br /><br /><div class="separator" style="clear: both; text-align: center;"><a href="http://www.mathplayground.com/brainie.html"><img alt="http://www.mathplayground.com/brainie.html" border="0" height="142" src="https://2.bp.blogspot.com/-ECGq6vH_DmQ/V8Hcvb1POYI/AAAAAAAABZk/-VTiK640-h83d9e1GyBvZdu_9bc17_2fQCLcB/s320/brainie.png" width="320" /></a></div><br /><br />It starts out with simple addition but advances in levels. Soon, you will see tiles with "-1", "-2", etc. which indicate subtraction. And after a few more levels you'll see *2 and similar, indicating multiplication.<br /><br /><br /><br />I liked it! :)<br /><br />Math Mammothhttps://plus.google.com/105961364219775463476noreply@blogger.com0tag:blogger.com,1999:blog-18322056.post-74932342476477617842016-08-18T16:18:00.000-04:002016-08-18T16:18:03.997-04:00Free online practice exercises for math<br /><div style="clear: right; float: right; margin-bottom: 1em; margin-left: 1em;"><img alt="Khan Academy logo" class="handtree_obxedk" data-reactid=".0.1.0.2.0" src="https://cdn.kastatic.org/images/khan-logo-vertical-transparent.png" /> </div><br /><br />Did you know that Khan Academy not only has videos, but they have added (in recent years) a TON of <b>free interactive practice exercises? </b><br /><br />These exercises are of good quality, and also include word problems, graphing, and other problems with visual models. And they span all areas of elementary, middle, and high school math. <br /><br />You might bookmark some of these pages, in case some day you'd like to find just a few extra practice exercises for your child or student (on just about any math topic) to do interactively... <br /><br />1. <a href="https://www.khanacademy.org/search">The search page</a><br /><br />The search for a math topic will list a lot of videos and exercises intermixed. It will help if you include the word "practice" in your search. <br /><br />2. <a href="https://www.khanacademy.org/commoncore/map">Common Core "map" page</a>, from where you can find all sorts of math exercises listed according to grade levels, then Common Core standards (videos not listed here) <br /><br />Math Mammothhttps://plus.google.com/105961364219775463476noreply@blogger.com0