Zad 10
a) (21/30 + 2/30) x 30 = 23/30 x 30 = 23
b) 3 5/8 - 2 x 7/6 = 3 5/8 - 2 1/3 = 3 15/24 - 2 8/24 = 1 7/24
Zad 11
2/3 x 12 = 8 odp. D
Zad 12
a) 2/3 : 8 + 17/6 : 2 = 2/3 x 1/8 + 17/6 x 1/2 = 1/12 + 17/12 = 18/12 = 1 1/2
b) (3 14/20 - 2 10/20)² : 5 = (1 4/20)² : 5 = 36/25 x 1/5 = 36/125 (tutaj się chyba coś zepsuło XD)
Zad 13
a) 5/8 x 1/3 = 5/24
b) 4/9 x 1/6 = 2/18 = 1/9
c) 9/8 x 1/9 = 8
d) 15/4 x 1/5 = 3/4
Zad 14
a) 570
b) 2280
c) 26410/23
