(1又3/4-1/8+7/2)除(-7/8)

问题描述:

(1又3/4-1/8+7/2)除(-7/8)

=(7/4-1/8+7/2) ×(-8/7)
=7/4 ×(-8/7)-1/8 ×(-8/7)+7/2 ×(-8/7)
=-2+1/7-4
=-41/7