8 целых 4_15 - 6 целых 8_15 +7 целых 14_15 9 целых 1_24 + 8 целых 23_24 -7 целых 11_24 11 целых 4_29 -( 7 целых 7_29

8 4/15 - 6 8/15 + 7 14/15 = 124/15 - 98/15 + 119/15 = 26/15 + 119/15 = 145/15 = 29/3 = 9 2/3;

9 1/24 + 8 23/24 - 7 11/24 = 217/24 + 215/24 - 179/24 = 432/24 - 179/24 = 253/24 = 10 13/24;

11 4/29 - (7 7/29 + 3 4/29) = 323/29 - (210/29 + 91/29) = 323/29 - 301/29 = 22/29.