Question

32.7*9.9+3.27简便方法

那个方法是什么前面扩大几倍 后面也扩大几倍 但忘了 谁帮帮我啊啊

Answer 1

32.7*9.9+3.27
32.7*9.9前面的32.7缩小10倍，后面的9.9放大10倍

32.7*9.9+3.27
=3.27*99+3.27
=3.27*（99+1）
=3.27*100
=327

Answer 2

32.7x9.9+3.27
=32.7x9.9+32.7x0.1
=32.7x(9.9+0.1)
=32.7x10
=327

Answer 3

32.7*9.9+32.7*0.1
32.7*(9.9+0.1)
32.7*10
327

追问

为啥*0.1 不是1么？？

追答

3.27=32.7*0.1 对不
用 32.7×0.1 替换 3.27