Reviewing 1st grade addition & subtraction facts

A customer asked me about reviewing addition/subtraction facts from 1st grade. The child is currently in 2nd grade but those facts continue to be a weak point, despite flash cards, daily drills on paper, and online drills in the past.

Here's my answer...

Check out these videos, which show you how the addition facts are taught in MM grade 1.

Subtraction facts don't need memorized separately. If you know that 5 + 4 = 9, from that you also know that 9 - 4 = 5 and 9 - 5 = 4. So, subtraction facts become "missing number" addition problems.

For example, 7 - 3 = ?

Think: which addition fact is this one: 3 + ___ = 7?

You can most likely make worksheets for her based on those videos, but if you want an actual book, check out these:

www.mathmammoth.com/addition_1.php

www.mathmammoth.com/subtraction_1.php

Hope this helps!
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