Ответ:
№780 1) 14/93+5=5 14/93
2) 6 17/41 + 7 19/41 = 13 36/41
3) 24 9/38 - 17 5/38 = 7 4/38 = 7 2/19
4) 15 7/10 - 2 4/10 + 6 1/10 = 13 3/10 + 6 1/10 = 19 4/10 = 19,4
№782 1) 7 14/15 + 2 1/15 = 9 15/15 = 10
2) 9 24/27 + 12 13/27 = 21 37/27= 22 10/27
3) 1 - 12/19 = 19/19 - 12/19 = 7/19
4) 8 - 3 6/15 = 7 15/15 - 3 6/15 = 4 9/15
5) 12 - 11 6/11 = 11 11/11 - 11 6/11 = 5/11
6) 16 3/13 - 6 8/13 = 15 16/13 - 6 8/13 = 9 8/13