8.25×9.9+0.825这道题的简便运算过程是什么?8.25×9.9+0.825!

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8.25×9.9+0.825这道题的简便运算过程是什么?8.25×9.9+0.825!8.25×9.9+0.825这道题的简便运算过程是什么?8.25×9.9+0.825!8.25×9.9+0.825

8.25×9.9+0.825这道题的简便运算过程是什么?8.25×9.9+0.825!
8.25×9.9+0.825这道题的简便运算过程是什么?8.25×9.9+0.825!

8.25×9.9+0.825这道题的简便运算过程是什么?8.25×9.9+0.825!
8.25*9.9+8.25*0.1
=8.25*(9.9+0.1)
=8.25*10
=82.5


原式=8.25×9.9+0.825
=8.25×(10-0.1)+0.825
=8.25×10-8.25×0.1+0.825
=82.5-0.825+0.825
=82.5

8.25×9.9 0.825 =8.25×9.9 8.25×0.1 =8.25×(9.9 0.1) =8.25×10 =82.5

8.25×9.9+0.825
=8.25×9.9+8.25×0.1
=8.25×(9.9+0.1)
=8.25×10
=82.5
啦啦啦,采纳吧