3分之17乘以11/8减去3/7乘以13/8用简便方法计算

17/3*11/8-3/7*13/8
=1/8*(187/3-39/7)
=1/8*(187*7-39*3)/21
=1/8*1192/21
=149/21
=7又2/21本回答被网友采纳

17/3*11/8-3/7*13/8
=1/8*(187/3-39/7)
=1/8*(187*7-39*3)/21
=1/8*1192/21
=149/21
=7又2/21