2/11 + 3/11 = 8/11 - 3/11 =3/4 + 2/3 - 1/2 =7 1/4 - 3 =6/7 + 1/7 + 3/7 =2/3 + 4/3 - 1/3 =3 2/5 + 1/7 =2 + 1/3 =2 1/5 + 3 1/3 = 5 - 2/3 + 1 1/2 =2/3 + 2 1/4 = посчитайте нужно

2/11+3/11=5/11

8/11 - 3/11=5/11

3/4+2/3-1/2=11/12

7 1/4 - 3=4 1/4

6/7+1/7+3/7=1 3/7

2/3+4/3-1/3=1 2/3

3 2/5+1/7= 3 19/35

2+1/3=2 1/3

2 1/5 + 3 1/3=5 8/15

5 - 2/3+1 1/2=5 5/6

2/3+2 1/4= 2 11/12