Key Idea1 of 3
Hop Backward to Subtract
On a number line, subtraction means hopping backward. To solve 5 - 2, start at 5 and hop back 2 times: 4, 3. You land on 3!
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Math — Subtraction to 5
On a number line, subtraction means hopping backward. To solve 5 - 2, start at 5 and hop back 2 times: 4, 3. You land on 3!