Question

简便计算9.9x8.6+0.86=?

Answer 1

解析：本题可用乘法分配律简便计算。则依题意可得，

9.9×8.6+0.86

＝9.9×8.6+0.86×1

＝9.9×8.6+8.6×0.1

＝8.6×(9.9+0.1)

＝8.6×10

＝86

Answer 2

利用乘法分配律计算为
9.9*8.6+0.86
=（9.9+0.1）*8.6
=10*8.6
=86
答案是86

Answer 3

9.9*8.6+0.86
=99*0.86+0.86
=0.86*（99+1）
=0.86*100
=86
想要用简便方法计算，就先变形，然后再利用乘法结合律。

Answer 4

这道题目可以把0.86提出来，具体过程如下。9.9*8.6+0.86=0.86*(99+1)=0.86*100=86

Answer 5

9.9×8.6+0.86
=9.9×8.6+8.6×0.1
=8.6×(9.9+0.1)
=8.6×10
=86