Нужен ответ вместе с решение по действиям 1) 20 1/3 - 8 (2/7+2 2/3) - 3 2) 6 4/13 - 4 2/3 + 8 1/13

Вычислим значения выражения:

1) 20 1/3 - 8 * (2/7 + 2 2/3) - 3 = 20 + 1/3 - 8 * (2/7 + 8/3) - 3 = 20 + 1/3 - 8 * (2 * 3 + 8 * 7) / 21 - 3 = 20 + 1/3 - 8 * 62/7 - 3 = 17 + 1/3 - 496/7 = 17 + 1/3 - 70 - 6/7 = - 53 + 1/3 - 6/7 = - 53 + (1 * 7 - 6 * 3) / 21 = - 53 + (7 - 18) / 21 = - 53 - 11/21 = - 53 11/21.

2) 6 4/13 - 4 2/3 + 8 1/13 = 6 + 4/13 - 4 - 2/3 + 8 + 1/13 = (6 - 4 + 8) + (4/13 - 2/3 + 1/13) = (2 + 8) + (5/13 - 2/3) = 10 + (5/13 - 2/3) = 10 + (5 * 3 - 2 * 13) / 39 = 10 + (15 - 26) / 39 = 10 + (-11/39) = 10 - 11/39 = 9 + 1 - 11/39 = 9 + 39/39 - 11/39 = 9 + 28/39 = 9 28/39.