- Math
- Addition Mental Strategies
- Age 10-12
-
level: 5
- English
คำแนะนำของผู้เขียน
Partitioning into froendly facts to simplify addition
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CHILL5 Math Addition Mentals Set 7
คำแนะนำของผู้เขียน
Partitioning into froendly facts to simplify addition