13问答网 > 1⼀8+2⼀15+7⼀30简便5⼀6+3⼀4-1⼀3简便11⼀12-(1⼀6+1⼀8)简便？

1⼀8+2⼀15+7⼀30简便5⼀6+3⼀4-1⼀3简便11⼀12-(1⼀6+1⼀8)简便？

2024-11-29 09:47:09

推荐回答（2个）

回答1：

1/8+2/15+7/30
=1/8+(2/15+7/30)
=1/8+(4/30+7/30)
=1/8+11/30
=15/120+44/120
=59/120
5/6+3/4-1/3
=5/6-1/3+3/4
=5/6-2/6+3/4
=3/6+3/4
=1/2+3/4
=2/4+3/4

=5/4
11/12-(1/6+1/8)
=11/12-1/6-1/8
=11/12-2/12-1/8
=9/12-1/8
=3/4-1/8
=6/8-1/8
=5/8

回答2：

1/8+2/15+7/30
=15/120+16/120+28/120
=59/120
5/6+3/4-1/3
=10/12+9/12-4/12
=17/12
11/12-(1/6+1/8)
=22/24-4/24-3/24
=15/24
=5/8