5 целых 1/8 + 4 целых 3/4 11 целых 6/10 - 10 целых 2/5 3/8*40 1/10:8

1) 5 1/8 + 4 3/4 = (5 * 8 + 1) / 8 + (4 * 4 + 3) / 4 = (40 + 1) / 8 + (16 + 3) / 4 = 41/8 + 19/4 = 41/8 + 2 * 19/8 = (41 + 38) / 8 = 79/8;

Ответ: 79/8.

2) 11 6/10 - 10 2/5 = (11 * 10 + 6) / 10 - (10 * 5 + 2) / 5 = (110 + 6) / 10 - (50 + 2) / 5 = 116/10 - 52/5 = 116/10 - 2 * 52/10 = (116 - 104) / 10 = 12/10 = 6/5;

Ответ: 6/5.

3) 3/8 * 40 1/10 : 8 = 3/8 * (40 * 10 + 1) / 10 * 1/8 = 3/8 * 401/10 * 1/8 = (3 * 401) / (8 * 10 * 8) = (3 * 401) / (8 * 10 * 8) = 1203/640;

Ответ: 1203/640.