Ответ:

Пошаговое объяснение:

5 + 2/3 * (-2 1/2) = 5 - 5/3 = 10/3 = 3 1/3

-2 : 5 1/3 - 7/10 : 1 1/15 = -2 : 16/3 - 7/10 : 16/15 = -2 * 3/16 - 7/10 * 15/16 = -3/8 - 21/32 = -33/32 = -1 1/32

2 1/5 * 1/3 + (-3/10) : 4 1/2 = 11/5 * 1/3 + (-3/10) : 9/2 = 11/15 - 1/15 = 10/15 = 2/3

3/7 - (1 1/4 - 1 1/8 * 2/9) = 3/7 - (5/4 - 9/8 * 2/9) = 3/7 - (5/4 - 1/4) = 3/7 - 1 = - 4/7