Odpowiedź:
a) 2/3 + 1/4 = 8/12 + 3/12 = 11/12
b) 5/9 + 3/5 = 25/45 + 27/45 = 52/45 = 1 i 7/45
c) 2/3 + 4/5 = 10/15 + 12/15 = 22/15 = 1 i 7/15
d) 5/8 + 3/7 = 35/56 + 24/56 = 59/56 = 1 i 3/56
e) 1 i 1/2 + 2 i 3/8 = 1 i 4/8 + 2 i 3/8 = 3 i 7/8
f) 2/9 + 1 i 7/27 = 6/27 + 1 i 7/27 = 1 i 13/27
g) 1 i 5/6 + 3 i 1/9 = 1 i 15/18 + 3 i 2/18 = 4 i 17/18
h) 2 i 1/10 + 1 i 7/15 = 2 i 3/30 + 1 i 14/30 = 3 i 17/30
