(6/7+16/13+20/9)➗(3/7+8/13+10/9)答案

问题描述:

(6/7+16/13+20/9)➗(3/7+8/13+10/9)答案

(6/7+16/13+20/9)➗(3/7+8/13+10/9)
=(2×3/7+2×8/13+2×10/9)➗(3/7+8/13+10/9)
=2×(3/7+8/13+10/9)➗(3/7+8/13+10/9)
=2