(1)
11/15=33/45
12/15=36/45
18/45
(2)
1/2=4/8
3/4=6/8
5/8
(3)
3/5=72/120
5/8=75/120
7/12=70/120
(4)
6/7=54/63
8/9=56/63
如果本题有什么不明白可以追问,
(1)
11/15=33/45
12/15=36/45
18/45
(2)
1/2=4/8
3/4=6/8
5/8
(3)
3/5=72/120
5/8=75/120
7/12=70/120
(4)
6/7=54/63
8/9=56/63
如果本题有什么不明白可以追问,