Question

пожалуйсто помогите ​

Answer 1

Пошаговое объяснение:

№1

1) 5/12 + 11/16 = 20/48 + 33/48 = 53/48

2) 53/48 : (-13/72) = 53/48 * (-72/13) = 53/2 * (-3/13) = -159/26 = -6 3/26

№2

1) 9/14 - (-5/21) = 9/14 + 5/21 = 27/42 + 10/42 = 37/42

2) 37/42 : (-2 9/14) = 37/42 : (-37/14) = 37/42 * (-14/37) = 1/3 * (-1/1) = -1/3

№3

1) 7/16 - 31/40 = 35/80 - 62/80 = -27/80

2) -17/24 + 27/40 = -85/120 + 81/120 = -4/120 = -1/30

3) -27/80 : (-1/30) = -27/80 * (-30/1) = -27/8 * (-3/1) = 81/8 = 10 1/8