Question

Помогите пожалуйста дам 90 балов

Answer 1

Пошаговое объяснение:

1) 7 5/12 + 3 11/12 = 10 16/12 = 11 4/12 = 11 1/3

2) 5 8/13 - (1 4/13 + 2 7/13) = 5 8/13 - 3 11/13 =

4 21/13 - 3 11/13 = 1 10/13

3) (4 5/9 - 2 7/9) + (6 - 1 4/9) = (3 14/9 - 2 7/9) +

(5 9/9 - 1 4/9) = 1 7/9 + 4 5/9 = 5 12/9 =

6 3/9 = 6 1/3

4) (5 3/10 + 4) - (3 7/10 - 2 9/10) = 9 3/10 -

(2 17/10 - 2 9/10) = 9 3/10 - 8/10 =

8 13/10 - 8/10 = 8 5/10 = 8 1/2