Subtraction within 5 represents taking away, finding the difference between two quantities, or determining an unknown part in situations involving 0–5 objects; learners connect equations such as with quantities, dot sets, and movement backward on a number line. They understand that subtraction is related to addition, includes subtracting zero and subtracting a quantity from itself, and is not commutative; regrouping, multi-digit computation, and subtraction with larger numbers are beyond this scope.
Subtraction means taking away to find how many are left.
Example: Solve .
Start with objects:
● ● ● ● ●
Take away objects:
● ● ● ● ●
Count the objects left. There are .
So,
You can also start at on a number line and move backward steps:
The answer is .
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