Сложите дроби: 1/4+5/6; 2/9+1/6. выполните сложение: 3/4+1/5; 1/36+5/12. найдите значение выражения: 1/3+1/6+1/18; 1/20+1/4+2/5.

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

2/9 + 1/6 = 4/18 + 3/18 = 7/18

3/4 + 1/5 = 15/20 + 4/20 = 19/20

1/36 + 5/12 = 1/36 + 15/36 = 16/36 = 4/9

1/3 + 1/6 + 1/18 = 6/18 + 3/18 + 1/18 = 10/18 = 5/9

1/20 + 1/4 + 2/5 = 1/20 + 5/20 + 8/20 = 6/20 + 8/20 = 14/20 = 7/10