Question

ПЖ СРОЧНО дам баллы ​

Answer 1

Пошаговое объяснение:

А

3/5 + 1/5 = (3+1)/5 = 4/5

2/7 + 1/7 = (2+1)/7 = 3/7

1 1/9 + 2 3/9 = (1+2) + (1+3)/9 = 3 + 4/9 = 3 4/9

Б

4/5 + 1/5 = 5/5 = 1

2 1/3 + 4 1/5 = 2 5/15 + 4 3/15 = 6 8/15

1/3 + 1/9 = 3/9 + 1/9 = 4/9

С

1 3/9 + 4 5/9 = 5 8/9

18 + 3 2/9 = 21 2/9

6 5/8 + 9 + 11/24 = 15 15/24 + 11/24 = 15 26/24 = 16 2/24 = 16 1/12