1.Сократите дроби: 35/42; 70/84;84/56 2. Сравните дроби: a) 3/16 и 5/24; б) 13/330 и 9/220 3.Выполните действия: а) 7/8

1. а) 35/42 = 35 : 7/42 : 7 = 5/6;б) 70/84 = 70 : 14/84:14 = 5/6;в) 84/56 = 84 : 28/56 : 28 = 3/2 = 1 1/2.2. а) 3/16 = 3 * 3/16 * 3 = 9/48;5/24 = 5 * 2/24 * 2 = 10/48;9/48 < 10/48.б) 13/330 = 13 * 2/330 * 2 = 26/660;9/220 = 9 * 3/220 * 3 = 27/660;26/660 < 27/660.3. а) 7/8 - 5/6 = 3 * 7/24 - 4 * 5/24 = 21/24 - 20/24 = 1/24.Ответ: 1/24.б) 13/16 - 7/24 = 3 * 13/48 - 2 * 7/48 = 39/48 - 14/48 = 25/48.Ответ: 25/48.в) 1) 19/20 - 5/12 = 3 * 19/60 - 5 * 5/60 = 57/60 - 25/60 = 32/60 = 8/15;2) 8/15 + 2/5 = 8/15 + 3 * 2/15 = 8/15 + 6/15 = 14/15.Ответ: 14/15.