(11.7乘57乘85)除(1.7乘1.9乘13乘5乘3)简便计算

问题描述:

(11.7乘57乘85)除(1.7乘1.9乘13乘5乘3)简便计算

=11.7*57*85/1.7/1.9/13/5/3
=11.7*57*50/1.9/13/5/3
=11.7*19*10/1.9/13
=11.7/13*100
=90