计算下面各题,用脱式计算。1⼀2+2⼀3-4⼀15。5⼀18-2⼀9+5⼀6

2024-11-15 05:03:39
推荐回答(1个)
回答1:

1/2+2/3-4/15
=15/30+20/30-8/30
=35/30-8/30
=27/30
=9/10

5/18-2/9+5/6
=5/18-4/18+15/18
=1/18+15/18
=16/18
=8/9