1)1 2\3 + 4 1\5=1 10/15+4 3/15=5 13/15 2)4 4\5+ 5 1\2=4 8/10+5 5/10=9 13/10=10 3/10 3) 3 1\13 + 2 2\5= 3 5/65+2 26/65=5 31/65 4) 4 1\6 + 7 2\7=4 7/42+7 12/42=11 19/42

1) 1 2/3 + 4 1/5 = 5/3 + 21/5= 88/15= 5 13/15

2) 4 4/5 + 5 1/2= 4,8 + 5,5= 10,3

3)  3 1/13 + 2 2/5= 39/13 + 12/15= 195/65 + 156/65= 251/65 = 3 56/65

4) 4 1/6 + 7 2/7= 175/42 + 306/42= 481/42= 11 19/42