6/7加7/9乘3/14,简便计算
问题描述:
6/7加7/9乘3/14,简便计算
答
请先标注 加法是否有括号呢
是加法的和再乘 还是先乘除后加减
答
6/7加7/9乘3/14
=6/7+1/6
=36/42+7/42
=43/42
答
6/7+7/9x3/14
=6/7+3/9x7/14
=6/7+1/3x1/2
=6/7+1/6
=43/42