分数,要求地等式要有通分过程。1⼀5+1⼀4。1⼀5-1⼀6。1⼀4-1⼀7。1⼀3-1⼀8。5⼀12+3⼀4+1⼀12

2025-04-04 20:54:20
推荐回答(1个)
回答1:

1/5+1/4。
=4/20+5/20
=(4+5)/20
=9/20

1/5-1/6。
=6/30-5/30
=(6-5)/30
=1/30

1/4-1/7。
=7/28-4/28
=(7-4)/28
=3/28

1/3-1/8。
=8/24-3/24
=(8-3)/24
=5/24

5/12+3/4+1/12
=5/12+9/12+1/12
=(5+9+1)/12
=15/12
=5/4