Найдите значение выражения (1 17/18*1 13/14-2 5/8: 1 19/20): (2 25/78-1 1/26) по действиям, !

1,875

Пошаговое объяснение:

(1 17/18 * 1 13/14 - 2 5/8 : 1 19/20) : (2 25/78 - 1 1/26) = 1,875

1) 1 17/18 * 1 13/14 = 35/18 * 27/14 = 15/4 = 3 3/4

2) 2 5/8 : 1 19/20 = 21/8 : 39/20 = 21/8 * 20/39 = 35/26 = 1 9/26

3) 15/4 - 35/26 = 195/52 - 70/52 = 125/52 = 2 21/52

4) 2 25/78 - 1 1/26 = 2 25/78 - 1 3/78 = 1 22/78 = 1 11/39 = 50/39

5) 125/52 : 50/39 = 125/52 * 39/50 = 5/4 * 3/2 = 15/8 = 1 7/8 = 1,875