Ответ:

Пошаговое объяснение:

А)

1) 5. 2/5 * 3. 1/3 = 27/5 * 10/3 = 9/1 * 2/1 = 18/1 = 18

2) 18 - 13. 4/5 = 17. 5/5 - 13. 4/5 = 4. 1/5

3) 4. 1/5 : 1. 13/15 = 21/5 : 28/15 = 21/5 * 15/28 = 3/1 * 3/4 = 9/4 = 2. 1/4

4) 2. 1/4 + 3. 5/6 = 2. 3/12 + 3. 10/12 = 5. 13/12 = 6. 1/12

Б)

1) 2. 22/25 * 1. 13/24 = 72/25 * 37/24 = 3/25 * 37/1 = 111/25 = 4. 11/25

2) 7 - 4. 11/25 = 6. 25/25 - 4. 11/25 =

2. 14/25

3) 2. 14/25 : 6. 2/5 = 64/25 : 32/5 = 64/25 * 5/32 = 2/5 * 1/1 = 2/5