(6.9乘0.125乘1.75)除(2.3乘8分之1乘4分之1)

问题描述:

(6.9乘0.125乘1.75)除(2.3乘8分之1乘4分之1)

(6.9x0.125x1.75)÷(2.3x1/8x1/4)
=(6.9x1/8x7/4)÷(2.3x1/8x1/4)
=(6.9÷2.3)x(1/8÷1/8)x(7/4÷1/4)
=3x1x7
=21