Людмила7 лет назад
1) 24/7 : 9 = 24/7 : 9/1 = 24/7 * 1/9 = (24 * 1) / (7/9) = 24/63.
2) 27/4 : 5 = 27/4 : 5/1 = 27/4 * 1/5 = (27 * 1) / (4 * 5) = 27/20 = 1 и 7/20.
3) 19/15 : 19 = 19/15 : 19/1 = 19/15 * 1/19 = (19 * 1) / (15 * 19) = 1/15 * 19/19 = 1/15 * 1 = 1/15.
4) 13/7 : 7 = 13/7 : 7/1 = 13/7 * 1/7 = (13 * 1) / (7 * 7) = 13/49.