Count Back to Subtract

1.OA.5 — Relate counting to addition and subtraction (counting on / counting back)

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What is on the three Count Back to Subtract worksheets

Support: draws a number line beside every problem.
On level: The grade's own level, with no drawings.
Challenge: uses the harder cases.

Example problems from the on-level sheet

12 - 3 = ___
8 - 2 = ___
18 - 3 = ___

Every sheet is generated, so the numbers are different each time you make one.

Before this: K.CC.4 — understand the relationship between numbers and quantities: one number name per object, the last number said tells how many, and each successive number is one larger.