Сравни дроби 1/7 и 4/21; 3/5 и 8/15; 3/5 и 11/20; 4/7и 16/28 почему
1/7 < 4/21 3/21 < 4/21 3/5 > 8/15 9/15 > 8/15 3/5 > 11/20 12/20 > 11/20 4/7 = 16/28 16/28 = 16/28