Помогите пожулуста пжпжпж

Пошаговое объяснение:

№3

1) 3/8 + 5/12 = 9/24 + 10/24 = 19/24

2) 1 7/12 : 19/24 = 19/12 * 24/19 = 1/1 * 2/1 = 2/1 = 2

№4

1) 7/12 - 5/9 = 21/36 - 20/36 = 1/36

2) 17/36 : 1/36 = 17/36 * 36/1 = 17/1 * 1/1 = 17/1 = 17

№5

1) 3/14 + 5/7 = 3/14 + 10/14 = 13/14

2) 13/14 : 3 5/7 = 13/14 : 26/7 = 13/14 * 7/26 = 1/2 * 1/2 = 1/4

№6

1) 3/16 + 5/24 = 9/48 + 10/48 = 19/48

2) 19/24 : 19/48 = 19/24 * 48/19 = 1/1 * 2/1 = 2/1 = 2