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21 April, 02:19

Beatrice multiplied 10*9. She quickly found the answer by placing a 0 behind the 9 to get an answer of 90. Is this reasonable?

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  1. 21 April, 04:52
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    Yes because when put into the vertical math problem-solving way, it equals 90. Plus that's a trick for multiplication. Anything * 10 = that number with a 0 behind it. Such as:

    737363*10=7373630
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