Question

Помогите прошу. Даю все бали

Answer 1

Пошаговое объяснение:

№1

1) 2 1/10 * 2 1/7 = 21/10 * 15/7 = 3/2 * 3/1 = 9/2 = 4 1/2

2) 6 - 4 1/2 = 5 2/2 - 4 1/2 = 1 1/2

3) 1 1/2 * 8/15 = 3/2 * 8/15 = 1/1 * 4/5 = 4/5

№2

1) (4 1/5 - 3 7/10)² = (4 2/10 - 3 7/10)² = (3 12/10 - 3 7/10)² = (5/10)² = (1/2)² = 1/2 * 1/2 = 1/4

2) (2/3)³ * 1/4 = (2/3 * 2/3 * 2/3) * 1/4 = 8/27 * 1/4 = 2/27 * 1/1 = 2/27

№3

6(5/6х - 1 1/3) = 13

5/6х - 1 1/3 = 13 : 6

5/6х - 1 1/3 = 13/6

5/6х = 13/6 + 1 1/3

5/6х = 2 1/6 + 1 2/6

5/6х = 3 3/6

х = 3 3/6 : 5/6

х = 21/6 * 6/5

х = 21/1 * 1/5

х = 21/5

х = 4 1/5

№4

9,6 - (2 3/5 + х) : 1 1/15 = 2,35

(2 3/5 + х) : 1 1/15 = 9,6 - 2,35

(2 3/5 + х) : 1 1/15 = 7,25

2 3/5 + х = 7,25 * 1 1/15

2 3/5 + х = 725/100 * 16/15

2 3/5 + х = 145/25 * 4/3

2 3/5 + х = 29/5 * 4/3

2 3/5 + х = 116/15

2 9/15 + х = 7 11/15

х = 7 11/15 - 2 9/15

х = 5 2/15