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Subtract by Thinking Addition - 1.OA.B.4 video lesson thumbnail

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1.OA.B.4 Grade 1 · Operations & Algebraic Thinking

Subtract by Thinking Addition

5:45 video lesson

What your child learns

Thinking of subtraction as a missing-addend problem: to find 10 − 8, ask "what do I add to 8 to make 10?"

Try it at home

Show 10 coins, hide some under your hand and ask how many are missing. Your child can count up to find out.

Words to use

missing number
count up
related facts

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