Suppose you want to model the
difference -4 - 7. do you need to add zero pairs? if so, why? how
many should you add? what is the difference?

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step-by-step explanation:

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r3t40

answer: 16

step-by-step explanation: first you would add 6+6 which equals 12 then add 2+2 which equals 4. then add 12 + 4 which is 16.

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the answer is a if my teacher taught me correct