(39/1+35/2)x13+35/9怎样简便算
问题描述：
(39/1+35/2)x13+35/9怎样简便算
答
楼主分子分母写反了吧？~
=1/39*13 + 2/35*13 + 9/35
=1/3 + (2*13+9)/35
=1/3 + 35/35
=4/3
答
(39/1+35/2)x13+35/9
=39/1x13+35/2x13+35/9
=3/1+35/26+35/9
=3/1+1
=3/4