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25 January, 01:58

Explain how to find 40 times 80 using mental math

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  1. 25 January, 02:51
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    First you can use simple multiplication. Take out the zeroes from 40 and 80. You get 4 and 8. 4 multipled by 8 is 32. so that means that 80 times 40 is 320
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