Zad 1
A) 2/3 + 1/5 = 10/15 + 3/15 = 13/15
B) 5/6 - 3/4 = 10/12 - 9/12 = 1/12
C) 7/20 - 1/4 = 7/20 - 5/20 = 2/20 = 1/10
Zad 2
A) 5 1/4 - 2 1/6 = 5 3/12 - 2 2/12 = 3 1/12
B) 4 1/3 + 2 1/6 = 4 2/6 + 2 1/6 = 6 3/6 = 6 1/2
C) 4 1/2 - 1 3/4 = 4 2/4 - 1 3/4 = 3 6/4 - 1 3/4 = 2 3/4
Zad 3
1 3/4 - 1/3 = 1 9/12 - 4/12 = 1 5/12
Odpowiedź:W dzbanku zostało 1 5/12 litra soku.