3целых -8/20 = ? 4 целых - 2 целых 2/11 = ? 5 целых 2/5 - 4/5 = ? 9 целых 16/25 - 6/25 = ? 1/3 - 1/4 = ? 2/3 -1/7 = ? 3/5 + 3/10 = ? решите дроби развёрнуто! заранее !

2) 

3)

4) 

5) 1\3 - 1\4 = 4\12 - 3\12 = 1\12

6) 2\3 - 1\7 = 14\21 - 3\21 = 11\21

7) 3\5 + 3\10 = 6\10 + 3\10 = 9\10

3 - 8/20 = 2 20/20 - 8/20 = 2 12/20 = 2 3/5
4 - 2 2/11 = 3 11/11 - 2 2/11 = 1 9/11
5 2/5 - 4/5 = 4 7/5 - 4/5 = 4 3/5
9 16/25 - 6/25 = 9 10/25 = 9 2/5
1/3 -1/4 = 4/12 - 3/12 = 1/12
2/3 - 1/7 = 14/21 - 3/21 = 11/21
3/5 + 3/10 = 6/10 + 3/10 = 9/10