by bill cruz 9 years ago
522
Add & Subtract Whole Numbers
Add & Subtract Whole Numbers
7+? =10
3+7=10
***+*******
Addition
+++
Math is very important in our lives !!!!
It is hard at first, but gets easier!!
Main topic
10-?=3
*******(***)
10-3=7
***(*******)
Subtraction
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