3/8+括号11/12-7/20括号等于多少
解:根据题意列式为:
3/8+(11/12-7/20)
=3/8+(55/60-21/60)
=3/8+34/60
=3/8+17/30
=45/120+68/120
=113/120
3/8+括号11/12-7/20括住
=3/8+(55/60-21/60)
=3/8+17/30
=45/120+68/120
=113/120
如图
原式=3/8+(55/60-21/60)
=3/8+17/30
=45/120+68/120
=113/120
113/120点一下赞谢谢!