30 operaciones mixtas de suma y resta de fracciones

1-1/4-3/4

5/7 5/9 2/7 4/9

4/6 2/6-2 /5-3/5

1/2 3/4 5/8

3/10 4/5 7/20

3/8 2/ 3-5/6

4/5-(1/3 3/10)

11-4/15-11/15

16-( 14/19 9/25)

1-(1/5 1/7)

1/4 1/8 1/6-1/24

3/4-1/2 2/3

1/6 2/5 7/10

2/3-1/4-1/5

19/20-(1/4 2/5)

7/8-(7/10-11/20)

15/16 4/5-15/ 16

3/5-1/4 3/5

4/15 9/20-3/10

18/20-(1/4 2/5)

5/8 7/12-4/9

17/18-(1/12 1/6)

1/2 1/4-1/8

(14/15-2/5)-1/3

4/11 2/5 7/11 1/5

4/5-3/10 2/3

3/7-(9/14-1/2)

8/9-5/9 1/6

8/15 2/5 1/2

2/3-4/7 5/6

30 líneas, no son suficientes para encontrarme