Question

ПОЖАЛУЙСТА СРОЧНО ПОМОГИТЕ!!!
(7/15 - 1/6) +2/5;
(3/8-1/9) +25/36;
(8/9 - 5/6) +2/3;
(7/8 - 13/20) +9/10;
(7/18 - 1/12) +5/6;
(3/4 - 8/15) +17/20;

Answer 1

Ответ:

(7/15 - 1/6) + 2/5 = (14/30 - 5/30) + 12/30 = 9/30 + 12/30 = 21/30 = 7/10

(3/8 - 1/9) + 25/36 = (27/72 - 8/72) + 25/36 = 19/72 + 25/36 = 218/72 = 109/36

(8/9 - 5/6) + 2/3 = (16/18 - 15/18) + 12/18 = 1/18 + 12/18 = 13/18

(7/8 - 13/20) + 9/10 = (35/40 - 26/40) + 36/40 = 9/40 + 36/40 = 45/40 = 9/8

(7/18 - 1/12) + 5/6 = (14/36 - 3/36) + 30/36 = 11/36 + 30/36 = 41/36

(3/4 - 8/15) + 17/20 = (45/60 - 32/60) + 51/60 = 13/60 + 51/60 = 64/60 = 8/5

Пошаговое объяснение: