Oblicz :
Zad 1 :Tuzin to 12 ,a kopa to 60 . Oblicz , ile to sztuka :
A) 3/4 tuzina
B)3 2/3 tuzina
C) 7/10 kopy
D)5 1/5 kopy
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A) 3/4*12=9
B) 3 2/3*12=44
C) 7/10*60=42
D)5 1/5*60=312
A) 3/4 tuzina 3/4 * 12 = 36/4 = 9 szt.
B)3 2/3 tuzina 3 2/3 * 12 = 11/3 * 12 = 132 / 3 = 44 szt.
C) 7/10 kopy 7/10 * 60 = 7 * 6 =(skaracamy)= 42 szt.
D)5 1/5 kopy 5 1/5 * 60 = 26/5 * 60 =(skracamy)= 26 * 12 = 312 szt.