分数除法题二十道？

1、4/9÷5/6
=4/9×6/5
=24/45
=8/15
2、7/10÷4/5
=7/10×5/4
=35/40
=7/8
3、14/15÷2/3
=14/15×3/2
=42/30
=7/5
4、3/8÷3/4
=3/8×4/3
=12/24
=1/2
5、7/8÷3/4
=7/8×4/3
=28/24
=7/6
6、4/7÷3/14
=4/7×14/3
=56/21
=8/3
7、4/5÷1/2
=4/5×2
=8/5
8、6/7÷1/3
=6/7×3
=18/7
9、5/12÷5/11
=5/12×11/5
=55/60
=11/12
10、3/7÷5/14
=3/7×14/5
=42/35
=6/5
11、13/14÷25/26
=13/14×26/25
=（13×26）/（14×25）
=338/350
=179/175
12、2/9÷6/14
=2/9×14/6
=28/54
=14/27
13、2/5÷12/25
=2/5×25/12
=50/60
=5/6
14、225÷1/2
=225×2
=450
15、25÷1/4
=25×4
=100
16、2.2÷1/10
=2.2×10
=22
17、5/4÷7/6
=5/4×6/7
=30/28
=15/14
18、1/4÷1/6
=1/4×6
=3/2
19、6/4÷8/6
=6/4×6/8
=36/32
=9/8
20、9/4÷18/6
=9/4×6/18
=9/4×1/3
=3/4