Verified answer

Решение на прикреплённой фотографии

Пошаговое объяснение:

а

1) 2/5 * 1/6 = = 2/12 = 1/6

2) 11/30 - 1/6 = 11/30 - 5/30 = 6/30 = 1/5

б

1) 1 3/8 + 3 2/3 = 1 9/24 + 3 16/24 = 4 25/24 = 5 1/24

2) 5 1/24 : 11/12 = 121/24 * 12/11 = 11/2 * 1/1 = 11/2 = 5 1/2

в

1) 1 2/5 * 3 1/3 = 7/5 * 10/3 = 70/15 = 14/3 = 4 2/3

2) 12 - 4 2/3 = 11 3/3 - 4 2/3 = 7 1/3

г

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

2) 28 : 7/6 = 28 * 6/7 = 4 * 6/1 = 24/1 = 24