Odpowiedź:
zad 3
a)
1/3 + 1/8+ 1/6 = 8/24 + 3/24 + 4/24 = 15/24 = 5/8
b)
1 3/4 + 2 4/5 + 3 3/10 = 1 15/20 + 2 16/20 + 3 6/20 = 6 37/20 = 7 17/20
c)
10 - (5 1/4 - 1 5/6) = 10 - ( 5 3/12 - 1 10/12) = 10 - ( 4 15/12 - 1 10/12) =
= 10 - 3 5/12 = 9 12/12 - 3 5/12 = 6 7/12