I have 15 apples. I add 12 more apples. What should I do?, 15 + 12, 15 − 12, I have 32 biscuits. I take 15 biscuits away. What should I do?, 32 + 15, 32 − 15, I have 7 apples. I add 3 more apples. What should I do?, 10 + 3, 10 − 3

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