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The closest estimate is the exact value.39*2 = (40 - 1)*2 = 80 - 2 = 78

Then 39*22 = 39*2*11 = 78*11 = 858


[Multiplication by 11 give the digits 7, 7+8 and 8 - with the carry overs applied to the answer.]

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8y ago
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8y ago

40 x 22 = 880

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Q: What is the closest estimate of 39 x 22?
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