Seven Up - game for addition facts (sums of 10)

This week, CodeLover (my son) and I played this simple card game Seven Up... see

You simply deal seven cards face up, and if any two of them make 10, or is 10, you remove those. (You need to remove the face cards from the deck before playing.) Then you simply deal more cards to the empty places and keep on going.

If you can't remove any of the cards, deal 7 new cards on top of your existing cards. This simple game is quite fun and practices sums with 10.

One question to ask is, do you always win? Can you always remove all the cards and have none left in the end of the game?

Another question you can ask your child is, can this be played so the sum of the cards you remove is 11? or some other number? 😃

Have fun!

Where do I start with Math Mammoth?

Where do I start with Math Mammoth? is a question I often hear (or read 😃 ).

Most of the time, the best starting place is this page:

Looking over the tests will give you an idea of what is covered in each grade level of Math Mammoth. A natural next step is to administer a placement test or several (instructions for this process is explained on the page), but it's not always necessary to administer a test. Sometimes the teacher/parent can see just by looking at the tests, where the child would place.

Often, the test reveals gaps, and you can use the TOPICAL books of the BLUE series to fill them in:

Or, you can use other materials you might have, or Khan Academy, etc. Sometimes it works out to use one of these review books to help a child get more solidified before starting a particular level in MM:…

Math Mammoth video review

Here's a new Math Mammoth video review posted on Youtube. (It does cover some other elementary math programs also.)

Practice mental additions & subtractions at!

Now you can practice more types of mental math at the Math Mammoth online practice section. 😄

We've added various types of exercises for adding & subtracting two-digit numbers mentally, mostly matching what is taught in Math Mammoth curriculum, in grades 1-2.

For example, children can practice adding a two-digit number and a single-digit number WITH or WITHOUT regrouping... e.g. 45 + 3 is without regrouping, but 45 + 8 is with regrouping.

Or they can practice adding/subtracting multiples of ten (56 - 30 or 34 + 60).

See more examples in the image above!

Here's the link for the online practice page (and it's AD-FREE, plus not made with Flash): Two-digit addition & subtraction practice – mental math.

Online practice for fact families (addition & subtraction)

New in the Math Mammoth online practice section!

Fact families (addition & subtraction)

Fact families is one of the main approaches I've used for addition & subtraction facts in the Math Mammoth curriculum. For example, in the online practice program, you could choose to practice fact families with 6. This means you will get addition & subtraction problems like what you see in the picture below -- and also including missing number problems.

Check it out!

Folding and cutting (paper) for geometric shapes

Here's an enjoyable math video for students and parents/teachers alike. It's about folding and cutting... but it still IS very much about math -- because the lady models the basics of mathematical thinking in a wonderful way as she goes on cutting shapes... 😊

BIG news: online math practice at

This is a big announcement!

I have the pleasure to announce a NEW section on Math Mammoth website that focuses on ONLINE PRACTICE for various math concepts!

I am sure that many of you will get lots of use out of this new section.

The scripts there have been made by my son; let's just call him Codelover 😃.

He's still pretty young, but he loves coding and web development, and has been learning a lot about those topics right and left for a while now (mostly using courses from Udemy).

I do have a favor to ask though. He made this section in such a manner that it SHOULD work offline (it's something called "progressive web app"; I don't personally understand these concepts nearly as well as he does so I won't even try to explain it). It seems that sometimes it's necessary to RELOAD the page a few times to make it work offline.

He would appreciate it if you can test whether it indeed works offline also, or not, and then leave feedback on the site. Please list you…