Subtraction within 10 represents taking away, finding a difference between two quantities, or determining an unknown part in a whole-part relationship, with minuends, subtrahends, and differences from 0 through 10. Learners connect subtraction to related addition facts and reason using objects, ten-frames, number lines, and equations, understanding that subtraction is not commutative; this scope excludes larger numbers, multi-digit procedures, and generalized symbolic methods.
Subtraction means taking away, or finding how many are left. In :
Start with objects:
● ● ● ● ● ● ● ●
Take away objects:
● ● ● ● ● ● ● ●
Count the objects left. There are .
So,
You can check with a related addition fact:
Therefore, is the difference, or the number left after taking away .
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