简便计算:7/13×0.8+1/13×4/5+5/13×80/100.要算式
问题描述：
简便计算:7/13×0.8+1/13×4/5+5/13×80/100.要算式
答
7/13×0.8+1/13×4/5+5/13×80/100=7/13×0.8+1/13×0.8+5/13×0.8
=0.8×（7/13+1/13+5/13)
=0.8×1
=0.8
不懂的问我哟~