Найди значение выражения с дробями.

Привет! Давай помогу тебе с этими заданиями. Выглядят они как примеры на умножение и сложение дробей. 1) $\frac{3}{4} \cdot \frac{6}{5} = \frac{3 \cdot 6}{4 \cdot 5} = \frac{18}{20} = \frac{9}{10}$ 2) $\frac{21}{5} \cdot \frac{3}{7} = \frac{21 \cdot 3}{5 \cdot 7} = \frac{63}{35} = \frac{9}{5} = 1\frac{4}{5}$ 3) $\frac{3}{5} \cdot \frac{25}{4} = \frac{3 \cdot 25}{5 \cdot 4} = \frac{75}{20} = \frac{15}{4} = 3\frac{3}{4}$ 4) $\frac{9}{5} \cdot \frac{2}{3} = \frac{9 \cdot 2}{5 \cdot 3} = \frac{18}{15} = \frac{6}{5} = 1\frac{1}{5}$ 5) $\frac{5}{3} \cdot \frac{9}{2} = \frac{5 \cdot 9}{3 \cdot 2} = \frac{45}{6} = \frac{15}{2} = 7\frac{1}{2}$ 6) $\frac{7}{5} \cdot \frac{12}{35} = \frac{7 \cdot 12}{5 \cdot 35} = \frac{84}{175} = \frac{12}{25}$ 7) $\frac{12}{5} \cdot \frac{15}{2} = \frac{12 \cdot 15}{5 \cdot 2} = \frac{180}{10} = 18$ 8) $\frac{6}{5} \cdot \frac{4}{11} = \frac{6 \cdot 4}{5 \cdot 11} = \frac{24}{55}$ 9) $\frac{3}{5} \cdot \frac{4}{35} = \frac{3 \cdot 4}{5 \cdot 35} = \frac{12}{175}$ 10) $\frac{15}{4} \cdot \frac{3}{7} = \frac{15 \cdot 3}{4 \cdot 7} = \frac{45}{28} = 1\frac{17}{28}$ 11) $\frac{21}{2} \cdot \frac{3}{5} = \frac{21 \cdot 3}{2 \cdot 5} = \frac{63}{10} = 6\frac{3}{10}$ 12) $\frac{14}{5} \cdot \frac{7}{2} = \frac{14 \cdot 7}{5 \cdot 2} = \frac{98}{10} = \frac{49}{5} = 9\frac{4}{5}$ 13) $\frac{1}{4} - \frac{3}{25} = \frac{25 - 12}{100} = \frac{13}{100}$ 14) $\frac{1}{5} - \frac{27}{50} = \frac{10 - 27}{50} = -\frac{17}{50}$ 15) $\frac{1}{2} - \frac{9}{25} = \frac{25 - 18}{50} = \frac{7}{50}$ 16) $\frac{1}{5} - \frac{3}{4} = \frac{4 - 15}{20} = -\frac{11}{20}$ 17) $\frac{1}{2} - \frac{13}{50} = \frac{25 - 13}{50} = \frac{12}{50} = \frac{6}{25}$ 18) $\frac{1}{10} - \frac{23}{20} = \frac{2 - 23}{20} = -\frac{21}{20} = -1\frac{1}{20}$ 19) $\frac{14}{25} + \frac{3}{2} = \frac{28 + 75}{50} = \frac{103}{50} = 2\frac{3}{50}$ 20) $\frac{9}{4} + \frac{8}{5} = \frac{45 + 32}{20} = \frac{77}{20} = 3\frac{17}{20}$ 21) $\frac{11}{5} + \frac{13}{4} = \frac{44 + 65}{20} = \frac{109}{20} = 5\frac{9}{20}$ 22) $\frac{1}{10} + \frac{21}{50} = \frac{5 + 21}{50} = \frac{26}{50} = \frac{13}{25}$ 23) $\frac{3}{4} + \frac{7}{25} = \frac{75 + 28}{100} = \frac{103}{100} = 1\frac{3}{100}$ 24) $\frac{4}{25} + \frac{15}{4} = \frac{16 + 375}{100} = \frac{391}{100} = 3\frac{91}{100}$