“[17.1减17.1除以(3.1减1.2)]乘0.6”的简便算法

问题描述:

“[17.1减17.1除以(3.1减1.2)]乘0.6”的简便算法

[17.1-17.1/(3.1-1.2)]*0.6
=[17.1-(19-1.9)/1.9]*0.6
=(17.1-19/1.9+1.9/1.9)*0.6
=(17.1-10+1)*0.6
=(17.1-9)*0.6
=8.1*0.6
=4.86