Ответ:

Пошаговое объяснение:

31.

1) 8. 2/15 - 2. 1/3 = 8. 2/15 - 2. 5/15 = 7. 17/15 - 2. 5/15 = 5. 12/15 = 5. 4/5

2) 5. 4/5 * 2. 1/2 = 29/5 * 5/2 = 29/2 = 14. 1/2

3) 14. 1/2 + 5. 3/4 = 14. 2/4 + 5. 3/4 = 19. 5/4 = 20. 1/4

32.

1) 4/15 + 2/5 = 4/15 + 6/15 = 10/15 = 2/3

2) 3. 1/3 * 3/5 = 10/3 * 3/5 = 10/5 = 2

3) 2/3 : 2 = 2/3 * 1/2 = 2/6 = 1/3

33.

1) 7/8 - 3/5 = 35/40 - 24/40 = 11/40

2) 2/3 + 1/2 = 4/6 + 3/6 = 7/6

3) 11/40 : 7/6 = 11/40 * 6/7 = 11/20 * 3/7 = 33/140

34.

1) 1. 1/6 : 1. 5/9 = 7/6 : 14/9 = 7/6 * 9/14 = 1/2 * 3/2 = 3/4

2) 3. 1/4 + 3/4 = 3. 4/4 = 4

3) 4 : 2. 2/7 = 4 : 16/7 = 4 * 7/16 = 1 * 7/4 = 7/4 = 1. 3/4

Ответ:

Вот:))))))))))))))))))))