(0.55-2/5)÷(6/7×3/8)怎样简便怎样算

问题描述:

(0.55-2/5)÷(6/7×3/8)怎样简便怎样算

(0.55-2/5)÷(6/7×3/8)
=3/20÷9/28
=3/20×28/9
=7/15