ДАЮ 63 БАЛА ДОПОМОЖІТЬ 62, 63 вправааа​

Пошаговое объяснение:

№62

1)

2/3а * 7/12в = (2/3 * 7/12) * а * в = 14/36ав = 7/18ав

2)

8/9х * 1 4/5у = (8/9 * 1 4/5) * х * у = (8/9 * 9/5) * ху = 8/5ху = 1 3/5ху

3)

5m * 2 6/11n * 2 5/14k =

(5 * 2 6/11 * 2 5/14) * m * n * k =

(5 * 28/11 * 33/14) * mnk =

(5 * 2/1 * 3/1) * mnk = (5 * 6/1) * mnk = 30mnk

№63

1)

5/14x - 9/28х + 11/42х = 30/84х - 27/84х + 22/84х = 25/84х

2)

8 13/18m - 4 7/12m + 5 5/6m =

8 26/36m - 4 21/36m + 5 30/36m = 9 35/36x