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2/5 liczby 15 to ....= 2 * 15/5=2*3=6
4/5 liczby 15 to ....=4 * 15/5=4*3=12
Oblicz Iloczyn :
1/5 • 15=15/5=3
2/5 • 15 =2* 15/5=2*3=6
4/5 • 15 =4 * 15/5=4*3=12
2)=6
3)=12
o to wyniki ... coś niejasne ?