5/7+ 3 целых 6/7= 1 целая 6/11 - 7/11= 9/15+7/15= 9 целых- 3 целых 7/8= 6 целых 6/13 - 5 целых 11/13= 2 целых 15/19+ 1 целая 5/19= 1 целая 5/7-6/7= 19/21+9/21= 9 целых 1/7-2 целых 5/7 6 целых 8/9+ 7 целых 5/9= 6/7+5/7= 5 целых 3/8-3 целых= 7 целых 9/17+8 целых 8/17= 9 целых 3/13-8 целых 9/13= 1 целая 6/11-7/11=

5/7+3 6/7=3+(5+6)/7=3 11/7=4 4/7

1 6/11-7/11=17/11-7/11=(17-7)/11=10/11

9/15+7/15=(9+7)/15=16/15=1 1/15

9-3 7/8=5 8/8-7/8=5+(8-7)/8=5 1/8

6 6/13 -5 11/13=1 6/13-11/13=(19-11)/13=8/13

2 15/19+1 5/19=3 20/19=4 1/19

1 5/7-6/7=12/7-6/7=6/7

19/21+9/21=28/21=1 7/21

9 1/7-2 5/7= 7 1/7-5/7=6 3/7

6 8/9+ 7 5/9=13 13/9=14 4/9

6/7+5/7=11/7=1 4/7

5 3/8-3=2 3/8

7 9/17+8 8/17=15 17/17=16

9 3/13-8 9/13=1 3/13-9/13=(16-9)/13=7/13

1 6/11-7/11=(17-7)/11=10/11