Zad. 1, str. 15

a) 36 + 42 = 30 + 6 + 40 + 2 = 78

72 + 18 = 70 + 10 + 2 + 8 = 90

62 + 29 = 60 + 20 + 2 + 9 = 91

b) 23 + 85 = 20 + 80 + 3 + 5 = 108

67 + 48 = 60 + 40 + 7 + 8 = 115

86 + 73 = 80 + 70 + 6 + 3 =