Question

617 выполните действия​ 1) (1/12 + 1/6):(3/8-1/4) помогите прошу пожалуйста

Answer 1

Пошаговое объяснение:

№617

1.

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

2) 3/8 - 1/4 = 3/8 - 2/8 = 1/8

3) 1/4 : 1/8 = 1/4 * 8/1 = 1/1 * 2/1 = 2/1 = 2

2.

1) 1 - 4/9 = 9/9 - 4/9 = 5/9

2) 1/3 - 1/4 = 4/12 - 3/12 = 1/12

3) 5/9 : 1/12 = 5/9 * 12/1 = 5/3 * 4/1 = 20/3 = 6 2/3

3.

1) 1/3 - 5/16 = 16/48 - 15/48 = 1/48

2) 1/6 - 1/8 = 4/24 - 3/24 = 1/24

3) 1/48 : 1/24 = 1/48 * 24/1 = 1/2 * 1/1 = 1/2

4.

1) 5/7 - 2/3 = 15/21 - 14/21 = 1/21

2) 4/9 - 5/12 = 16/36 - 15/36 = 1/36

3) 1/21 : 1/36 = 1/21 * 36/1 = 1/7 * 12/1 = 12/7 = 1 5/7