Question

3) 1 3/7 - 1/3 :2,8*3 3/5 Помогите срочно (2, 375 - 1/3 + 1 1/12) *0,8

Answer 1

Пошаговое объяснение:

№3

1) 1/3 : 2,8 = 1/3 : 2 8/10 = 1/3 : 28/10 = 1/3 * 10/28 = 10/84 = 5/42

2) 5/42 * 3 3/5 = 5/42 * 18/5 = 1/7 * 3/1 = 3/7

3) 1 3/7 - 3/7 = 1

№4

1) 2,375 - 1/3 = 2 375/1000 - 1/3 = 2 3/8 - 1/3 = 2 9/24 - 8/24 = 2 1/24

2) 2 1/24 + 1 1/12 = 2 1/24 + 1 2/24 = 3 3/24 = 3 1/8

3) 3 1/8 * 0,8 = 25/8 * 8/10 = 5/1 * 1/2 = 5/2 = 2 1/2 или 2,5