- Math
- Addition and subtraction
- Age 9-12
-
level: 4
- English
คำแนะนำของผู้เขียน
finding missing numbers in addition and subtraction items by following in finding missing addends, missing minuends and missing subtrahends.
Finding missing numbers
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คำแนะนำของผู้เขียน
finding missing numbers in addition and subtraction items by following in finding missing addends, missing minuends and missing subtrahends.