Question

помогите пжпжпжпжпжпжпж​

Answer 1

Ответ:

Пошаговое объяснение:

№1

1) 42 * 2/7 = 6 * 2/1 = 12/1 = 12 (чел) - пятиклассников

2) 42 - 12 = 30 (чел) - из других классов

№ 2

3/16 + 5/8 = 3/16 + 10/16 = 13/16

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

25/34 - 4/17 = 25/34 - 8/34 = 17/34 = 1/2

19/20 - 3/4 = 19/20 - 15/20 = 4/20 = 1/5

1/6 + 3/10 = 5/30 + 9/30 = 14/30 = 7/15

3/8 + 1/6 = 9/24 + 4/24 = 13/24

1/4 + 2/3 = 3/12 + 8/12 = 11/12

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

7/15 + 3/12 = 28/60 + 15/60 = 43/60