а) 1/8 + 3/8 = 4/8 = 1/2 - сократили на 4
б) 2/9 + 1/9 = 3/9 = 1/3 - сократили на 3
в) 1/4 + 3/5 = 5/20 + 12/20 = 17/20
г) 3/10 + 3/8 = 12/40 + 15/40 = 27/40
д) 4/25 + 9/10 = 8/50 + 45/50 = 53/50 = 1 целая 3/50
е) 1/30 + 3/45 = 1/30 + 1/15 = 1/30 + 2/30 = 3/30 = 1/10 - сократили на 3
ж) 1 3/14 + 2 1/14 = 3 4/14 = 3 2/7 - сократили на 2
з) 1/8 + 1 3/4 = 1/8 + 1 6/8 = 1 целая 7/8
и) 3 1/5 + 2/3 = 3 3/15 + 10/15 = 3 целых 13/15
к) 2/5 + 3/10 + 7/20 = 8/20 + 6/20 + 7/20 = 21/20 = 1 целая 1/20
л) 2/3 + 5/12 + 9/24 = 16/24 + 10/24 + 9/24 = 35/24 = 1 целая 11/24
а) 1/8 + 3/8 = 4/8 = 1/2 - сократили на 4
б) 2/9 + 1/9 = 3/9 = 1/3 - сократили на 3
в) 1/4 + 3/5 = 5/20 + 12/20 = 17/20
г) 3/10 + 3/8 = 12/40 + 15/40 = 27/40
д) 4/25 + 9/10 = 8/50 + 45/50 = 53/50 = 1 целая 3/50
е) 1/30 + 3/45 = 1/30 + 1/15 = 1/30 + 2/30 = 3/30 = 1/10 - сократили на 3
ж) 1 3/14 + 2 1/14 = 3 4/14 = 3 2/7 - сократили на 2
з) 1/8 + 1 3/4 = 1/8 + 1 6/8 = 1 целая 7/8
и) 3 1/5 + 2/3 = 3 3/15 + 10/15 = 3 целых 13/15
к) 2/5 + 3/10 + 7/20 = 8/20 + 6/20 + 7/20 = 21/20 = 1 целая 1/20
л) 2/3 + 5/12 + 9/24 = 16/24 + 10/24 + 9/24 = 35/24 = 1 целая 11/24