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4/9 = 0,(4)
2 7/11= 2,(63)
2)50- (2*20,50)=50 - 41=9 zl.
na karcie zostalo 9 zlotych.
a) 0,444
b) 2,636363
zad.2.
20,50*2= 41
50-41=9
Na karcie zostało 9 zł