Сравните дроби: а) 2/3 и 8/21 б)4/15 и 2/5 в) 7/30 и 3/10 г) 19/60 и 4/15
2/3 > 8/21, т.к. 14/21 > 8/21 4/15 < 2/5, т.к. 4/15 < 6/15 7/30 < 3/10, т.к. 7/30 < 9/30 19/60 > 4/15, т.к. 19/60 > 16/60