Odpowiedź:
3a : 4 dla a = 2 2/5
3 • 2 2/5 : 4 = 3 • 12/5 = 36/5 : 4 = 36/5 • 1/4 (36 i 4 skracamy przez 4) = 9/5 = 1 4/5
[tex]3\cdot2\frac{2}{5} :4=\frac{3}{1}\cdot\frac{5\cdot2+2}{5}:\frac{4}{1}=\frac{3}{1} \cdot\frac{12}{5}\cdot \frac{1}{4} = \frac{36}{20} =\frac{18}{10}=1,8[/tex]
