计算下面各题,并验算2/3-1/2= 5/6×4/7= 3.85*4.2= 3182/37=
问题描述：
计算下面各题,并验算2/3-1/2= 5/6×4/7= 3.85*4.2= 3182/37=
是分开的
答
2/3-1/2
=4/6-3/6
=1/6
5/6×4/7
=5/3×2/7
=10/21
3.85*4.2
=16.17
3182/37
=86