Odpowiedź:
Szczegółowe wyjaśnienie:
[tex]\frac{3}{4} + \frac{5}{6} = \frac{9}{12} + \frac{10}{12} = \frac{19}{12} \\2\frac{1}{8} - \frac{5}{6} = 2\frac{3}{24} - \frac{20}{24} = 1\frac{7}{24} \\2 \frac{2}{9} + 1\frac{5}{6} = 2 \frac{4}{18} + 1\frac{15}{18} = 3\frac{19}{18} \\\frac{3}{4} * 20 = 3 * 5 = 15\\2\frac{1}{2} *8= \frac{5}{2} * 8 = 20\\\frac{3}{4} * \frac{12}{21} = \frac{3}{7} \\1\frac{1}{2} * 2\frac{3}{4} = \frac{3}{2} * \frac{11}{4} = \frac{33}{8}[/tex]
