1.
25/24     1/4
5/8         8/15
29/24     17/42

2.
解：
x=4/6
x=2/3

解：
x=1/4

解：
x=13/14

解：
x=4/5-7/10+1/2
x=3/5

3.
3/5+1/2+3/10
=6/10+5/10+3/10
=7/5

6/7-1/2-3/14
=12/14-7/14-3/14
=1/7

8/9-(2/9+1/3)
=7/9-3/9
=4/9

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

8/11+7/9+3/11
=1+7/9
=16/9

1/2+4/5-1/2+4/5
=4/5+4/5
=8/5

1.
25/24     1/4
5/8         8/15
29/24     17/42

2.
解：
x=4/6
x=2/3

解：
x=1/4

解：
x=13/14

解：
x=4/5-7/10+1/2
x=3/5

3.
3/5+1/2+3/10
=6/10+5/10+3/10
=7/5

6/7-1/2-3/14
=12/14-7/14-3/14
=1/7

8/9-(2/9+1/3)
=7/9-3/9
=4/9

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

8/11+7/9+3/11
=1+7/9
=16/9

1/2+4/5-1/2+4/5
=4/5+4/5
=8/5