Расположите в порядке убывания числа: 1) 4/9, 1/4, 7/12, 13/18; 2) 28/45, 5/9, 7/10, 13/18, 8/15

1) 4/9 * 4/4 = 16/36, 1/4 * 9/9 = 9/36, 7/12 * 3/3 = 21/36, 13/18 * 2/2 = 26/36;Ответ: 13/18, 7/12, 4/9, 1/42) 28/45 * 2/2=56/90, 5/9 * 10/10=50/90, 7/10 * 9/9=63/90, 13/18 * 5/5=65/90, 8/15 * 6/6 = 48/90Ответ: 13/18, 7/10, 28/45, 5/9, 8/15,