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If used compensation to find product of 37x4 first she found 40x4=160 then adjusted that product by adding 3 groups of 4 to get her final answer 172. What did she do incorrectly…

If used compensation to find product of 37x4 first she found 40x4=160 then adjusted that product by adding 3 groups of 4 to get her final answer 172. What did she do incorrectly…
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If used compensation to find product of 37x4 first she found 40x4=160 then adjusted that product by adding 3 groups of 4 to get her final answer 172. What did she do incorrectly?

User Marty McGee
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1 Answer

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She added to the answer of 40x4, when she added to 37. She should have subtracted.
User Arun Kumaresh
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