Question

Допоможіть дам 100балів

Answer 1

Пошаговое объяснение:

1) 1/10 + 1/5 = 1/10 + 2/10 = 3/10

2) 2/7 + 1/3 = 6/21 + 7/21 = 13/21

3) 1/3 + 1/2 = 2/6 + 3/6 = 5/6

4) 3/4 - 2/9 = 27/36 - 8/36 = 19/36

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

6) 5/8 - 1/6 = 15/24 - 4/24 = 11/24

7) 4 - 6/13 = 3 13/13 - 6/13 = 3 7/13

8) 8 - 3 2/5 = 7 5/5 - 3 2/5 = 4 3/5

9) 3/4 - 3/10 = 15/20 - 6/20 = 9/20

10) 5/12 - 7/18 = 15/36 - 14/36 = 1/36

11) 6/21 - 3/14 + 2/7 = 12/42 - 9/42 + 12/42 = 15/42 = 5/14

12) 1/2 - (3/5 - 1/6) = 15/30 - (18/30 - 5/30) = 15/30 - 13/30 = 12/30 = 2/5