Question

помогите пажаоуйста
Задание N°980
Вычислите рациональным способом​

Answer 1

Ответ:

Пошаговое объяснение:

1.

1) 3/8 + 7/12 + 1/2 = 9/24 + 14/24 + 12/24 = (9+14+12)/24 = 35/24

2) 3/4 - 5/8 + 1/6 = 18/24 - 15/24 + 4/24 = (18-15+4)/24 = 7/24

3) 35/24 : 7/24 = 35/24 * 24/7 = 35/7 = 5

2.

1) 5/9 - 1/6 + 2/3 = 10/18 - 3/18 + 12/18 = (10-3+12)/18 = 19/18

2) 5/6 - 1/2 - 2/9 = 15/18 - 9/18 - 4/18 = (15-9-4)/18 = 2/18 = 1/9

3) 19/18 : 1/9 = 19/18 * 9/1 = 19/2 * 1/1 = 19/2 = 9. 1/2

3.

1) 7/12 - 2/15 - 1/4 = 35/60 - 8/60 - 15/60 = (35-8-15)/60 = 12/60 = 1/5

2) 1/3 - 1/30 - 2/15 = 10/30 - 1/30 - 4/30 = (10-1-4)/30 = 5/30 = 1/6

3) 1/5 : 1/6 = 1/5 * 6/1 = 6/5 = 1. 1/5