Вычислите: (3 1/4 + 2 1/6) : 2 3/5 - 2/3 * 2 1/4 + 5 1/6

Хочу проверить ответы.

(3 1/4 + 2 1/6) : 2 3/5 - 2/3 * 2 1/4 + 5 1/6 = 5 3/4

1) 3 1/4 + 2 1/6 = 3 3/12 + 2 2/12 = 5 5/12

2) 5 5/12 : 2 3/5 = 65/12 : 13/5 = (65*5) / (12*13) =

= (5*5) / (12*1) = 25/12 = 2 1/12

3) 2/3 * 2 1/4 = 2*9 / 3*4 = 1*3 / 1*2 = 3/2 = 1 1/2

4) 2 1/12 - 1 1/2 = 25/12 - 18/12 = 7/12

5) 7/12 + 5 1/6 = 7/12 + 5 2/12 = 5 9/12 = 5 3/4