Вопрос такого рода. Сколько будет 17/4 / 10 1/5 - 0,2 х 2 5/6 - 1 12/12

17/4 : 10 1/5 - 0, 2 * 2 5/6 - 1 12/12 = 1 17/20.

1) 17/4 : 10 1/5 = 17/4 : 51/5 = 17/4 * 5/51 = (17 * 5)/(4 * 51) =

(1 * 5)/(4 * 3) = 5/12.

2) 0, 2 * 2 5/6 = 2/10 * 17/6 = 1/5 * 17/6 = 17/30.

3) 5/12 - 17/30 = 25/60 - 34/60 = - 9/60 = - 3/20.

4) - 3/20 - (1 12/12) = - 3/20 + 2 = 2 - 3/20 = 1 20/20 - 3/20 =

1 17/20.