Odpowiedź:
a)
[tex]5 * \frac{3}{20} = \frac{15}{20} = \frac{3}{4}[/tex]
[tex]\frac{3}{4} * 6 = \frac{18}{4} = \frac{9}{2} =4\frac{1}{2}[/tex]
b)
[tex]2\frac{2}{3} + 3\frac{1}{2} = 2\frac{4}{6} + 3\frac{3}{6} = 5\frac{7}{6} = 6\frac{1}{6}[/tex]
[tex]6\frac{1}{6} * 6 = 36\frac{6}{6} = 37[/tex]
c)
[tex]3 * \frac{1}{4} = \frac{3}{4}[/tex]
[tex]\frac{2}{9} * 3 = \frac{6}{9} = \frac{2}{3}[/tex]
[tex]\frac{3}{4} - \frac{2}{3} = \frac{9}{12} - \frac{8}{12} = \frac{1}{12}[/tex]
d)
[tex]2 * 1\frac{2}{3} = 2\frac{4}{3} = 3\frac{1}{3}[/tex]
[tex]\frac{3}{4} * 8 = \frac{24}{4} = 6[/tex]
[tex]5\frac{1}{2} - 3\frac{1}{3} = 5\frac{3}{6} - 3\frac{2}{6} = 2\frac{1}{6}[/tex]
[tex]2\frac{1}{6} - 6 =- 3\frac{5}{6}[/tex]
