Вопрос:

1. Выполните деление: 1) 5/6 : 4/7; 2) 6/35 : 48/49; 3) 8/15 : 32/75; 4) 45/56 : 54/49.

Ответ:

1) 5/6 * 7/4 = 35/24.
2) 6/35 * 49/48 = (6*49)/(35*48) = (1*7)/(5*8) = 7/40.
3) 8/15 * 75/32 = (8*75)/(15*32) = (1*5)/(1*4) = 5/4.
4) 45/56 * 49/54 = (45*49)/(56*54) = (5*7)/(8*6) = 35/48.