Найдите Значение выражения: (1. 1/2 - 3/4) • ( 5 - 1. 2/3) : 3. 1/8

(1 1/2 - 3/4) * ( 5 - 1 2/3) : 3 1/8 = 3/5. 

1). 1 1/2 - 3/4 = 3/2 - 3/4 = (3 * 2) / (2 * 2) - 3/4 = 6/4 - 3/4 = (6 - 3) / 4 = 3/4; 

2). 5 - 1 2/3 = 4 3/3 - 1 2/3 = (4 - 1) + (3 - 2) / 3 = 3 + 1/3 = 3 1/3; 

3). 3/4 * 3 1/3 = 3/4 * 10/3 = (3 * 10) / (4 * 3) = 30/12 = 2 6/12 = 2 1/2; 

4). 2 1/2 : 3 1/8 = 5/2 : 25/8 = 5/2 * 8/25 = (5 * 8) / (2 * 25) = 30/50 = 3/5.