Verified answer

Пошаговое объяснение:

а) 4/5 * 15 = 4/1 * 3 = 12/1 = 12

в) 11/12 * 36 = 11/1 * 3 = 33/1 = 33

с) 1/5 * 3 7/8 = 1/5 * 31/8 = 31/40

д) 2/7 * 3 1/3 = 2/7 * 10/3 = 20/21

е) 2/3 * 1 4/5 = 2/3 * 9/5 = 2/1 * 3/5 = 6/5 = 1 1/5

ф) 1/6 * 3/25 = 1/2 * 1/25 = 1/50