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indira predicts that the actual difference of 19-7.82 will be greater than the estamate of19-8 =11. is indira correct? explain how indira might have arrived at that prediction without subtracting the actual numbers.

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7.82 is a little less than 8 (it rounds to 8). 

Therefore 19 - 7.82 will be a little more than 11

To be more accurate .82 is .18 away from 1

Therefore the exact answer would be 8.18

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