Question

用简便方法计算 要过程和答案

108.23×9÷3.7×6.29÷1.37
用简便方法计算 要过程和答案

Answer 1

108.23×9÷3.7×6.29÷1.37
=108.23×9×(1/3.7)×6.29×(1/1.37)
=[108.23×(1/1.37)]×[6.29×(1/3.7)]×9
=79×1.7×9
=1208.7
=1208.7对不对

Answer 2

=79×1.37×9÷3.7×1.7×3.7÷1.37
=79×9×1.7
=(80-1)(10-1)*1.7
=(800-80-10+1)*1.7
=1208.7

Answer 3

108.23×9÷3.7×6.29÷1.37
=108.23×9×(1/3.7)×6.29×(1/1.37)
=[108.23×(1/1.37)]×[6.29×(1/3.7)]×9
=79×1.7×9
=1208.7

Answer 4

108.23×9÷3.7×6.29÷1.37
=(108.23/1.37)*9*(6.29/3.7)
=79*9*1.7
=1208.7

Answer 5

这79 X 1.37 =108.23是用眼睛能看出来的？？？既然都用计算器了，就一口气算完好啦！虽然我没有更好的办法。。。。