13/11*11/26+13/2简便计算
问题描述:
13/11*11/26+13/2简便计算
答
13/11*11/26+13/2
=13/2+13/2
=13/43/8-15/19*8/3怎么做?3/8+1/15×3/8=3/8×(1+1/15)=3/8×16/15=2/5