помогите пожалуйста.​

Ответ:

Пошаговое объяснение:

N 1

1) 5/6 + 3/7 = 35/42 + 18/42 = 53/42 = 1. 11/42

2) 1. 11/42 - 5/9 =

1. 33/126 - 70/126 =

159/126 - 70/126 = 89/126

N 2

1) 8/9 - 5/6 = 32/36 - 30/36 = 2/36 = 1/18

2) 2/3 + 1/18 = 12/18 + 1/18 = 13/18

N 3

1) 7/8 - 13/20 = 35/40 - 26/40 = 9/40

2) 9/40 + 9/10 = 9/40 + 36/40 = 45/40 = 9/8 = 1. 1/8

N 4

1) 7/15 - 1/6 = 14/30 - 5/30 = 9/30 = 3/10

2) 3/10 + 2/5 = 3/10 + 4/10 = 7/10

N 5

1) 3/4 - 8/15 = 45/60 - 32/60 = 13/60

2) 13/60 + 17/20 = 13/60 + 51/60 = 64/60 = 16/15 =

1. 1/15

N 6

1) 7/18 - 1/12 = 14/36 - 3/36 = 11/36

2) 5/6 + 11/36 = 30/36 + 11/36 = 41/36 = 1. 5/36