Дроби к общим знаменателям 1) 3/8и15/16 2)19/80и13/16 3)5/9и41/81 4)11/75и14/15 1)1/8и1/10 2)6/25и7/40 3)5/16и1/12 4)1/24и5/18

1) 3/8 и 5/16 = 6/16 и 5/16 
2) 19/80 и 13/16 = 19/80 и 65/80
3) 5/9 и 41/81 = 45/81 и 41/81
4) 11/75 и 14/15 = 11/75 и 55/75

1) 1/8 и 1/10 = 10/80 и 8/80
2) 6/25 и 7/40 = 48/200 и 35/200
3) 5/16 и 1/12 = 15/48 и 4/48
4) 1/24 и 5/18 = 3/72 и 20/72