1838.Выполните действия с решением.ПОМОГИТЕ СРОЧНО!!! 20 баллов​

Ответ:

Пошаговое объяснение:

1.

1) 2. 2/11 * 7/8 = 24/11 * 7/8 = 3/11 * 7/1 = 21/11

2) 21/11 : 7/11 = 21/11 * 11/7 = 21/7 = 3

2.

1) 3. 2/3 * 4. 7/8 = 11/3 * 39/8 = 11/1 * 13/8 = 143/8

2) 143/8 : 13/16 = 143/8 * 16/13 = 11/1 * 2/1 = 22/1 = 22

3.

1) 1. 1/3 * 2. 2/3 = 4/3 * 8/3 = 32/9

2) 32/9 : 4/9 = 32/9 * 9/4 = 32/4 = 8

4.

1) 6. 4/15 * 1/2 = 94/15 * 1/2 = 47/15 * 1/1 = 47/15

2) 47/15 : 3. 2/15 = 47/15 : 47/15 = 47/15 * 15/47 = 1

5.

1) 8. 1/3 * 1. 5/7 = 25/3 * 12/7 = 25/1 * 4/7 = 100/7

2) 100/7 : 2. 8/21 = 100/7 : 50/21 = 100/7 * 21/50 = 2/1 * 3/1 = 6/1 = 6

6.

1) 1. 5/6 * 3. 3/5 = 11/6 * 18/5 = 11/1 * 3/5 = 33/5

2) 33/5 : 2. 1/5 = 33/5 : 11/5 = 33/5 * 5/11 = 33/11 = 3