1)7 1/2*12 1/4*8/49 2)5*1 1/7*2 1/3*3/10 даю 100 балов срочно!

Пошаговое объяснение:

1)

7 1/2 * 12 1/4 * 8/49 = 15/2 * 49/4 * 8/49 =

15/2 * 1/1 * 2/1 = 15/2 * 2/1 = 15/1 * 1/1 = 15/1 = 15

2)

5 * 1 1/7 * 2 1/3 * 3/10 = 5 * 8/7 * 1/3 * 3/10 =

40/7 * 1/1 * 1/10 = 40/7 * 1/10 = 40/70 = 4/7