Реши примеры с дробями: 1) 90 * 4/63

Конечно, давай решим эти примеры вместе! 1) $90 \cdot \frac{4}{63} = \frac{90 \cdot 4}{63} = \frac{360}{63} = \frac{40}{7} = 5\frac{5}{7}$ 2) $\frac{15}{34} \cdot 16 = \frac{15 \cdot 16}{34} = \frac{240}{34} = \frac{120}{17} = 7\frac{1}{17}$ 3) $\frac{11}{26} \cdot \frac{1}{2} = \frac{11 \cdot 1}{26 \cdot 2} = \frac{11}{52}$ 4) $\frac{1}{3} \cdot \frac{1}{5} = \frac{1 \cdot 1}{3 \cdot 5} = \frac{1}{15}$ 5) $\frac{5}{66} \cdot \frac{9}{20} = \frac{5 \cdot 9}{66 \cdot 20} = \frac{45}{1320} = \frac{3}{88}$ 6) $\frac{2}{55} \cdot \frac{35}{4} = \frac{2 \cdot 35}{55 \cdot 4} = \frac{70}{220} = \frac{7}{22}$ 7) $2\frac{14}{15} \cdot 5\frac{7}{16} = \frac{44}{15} \cdot \frac{87}{16} = \frac{44 \cdot 87}{15 \cdot 16} = \frac{3828}{240} = \frac{319}{20} = 15\frac{19}{20}$ 8) $8\frac{3}{4} \cdot 1\frac{11}{15} = \frac{35}{4} \cdot \frac{26}{15} = \frac{35 \cdot 26}{4 \cdot 15} = \frac{910}{60} = \frac{91}{6} = 15\frac{1}{6}$ 9) $12 : \frac{10}{11} = 12 \cdot \frac{11}{10} = \frac{12 \cdot 11}{10} = \frac{132}{10} = \frac{66}{5} = 13\frac{1}{5}$ 10) $\frac{2}{7} : 16 = \frac{2}{7} \cdot \frac{1}{16} = \frac{2}{7 \cdot 16} = \frac{2}{112} = \frac{1}{56}$ 11) $\frac{9}{32} : \frac{3}{4} = \frac{9}{32} \cdot \frac{4}{3} = \frac{9 \cdot 4}{32 \cdot 3} = \frac{36}{96} = \frac{3}{8}$ 12) $3\frac{1}{4} : 4\frac{1}{3} = \frac{13}{4} : \frac{13}{3} = \frac{13}{4} \cdot \frac{3}{13} = \frac{13 \cdot 3}{4 \cdot 13} = \frac{3}{4}$ 13) $1\frac{1}{10} : 6\frac{1}{2} = \frac{11}{10} : \frac{13}{2} = \frac{11}{10} \cdot \frac{2}{13} = \frac{11 \cdot 2}{10 \cdot 13} = \frac{22}{130} = \frac{11}{65}$ 14) $0,5 \cdot \frac{1}{2} = \frac{1}{2} \cdot \frac{1}{2} = \frac{1}{4}$ 15) $\frac{3}{8} : 0,75 = \frac{3}{8} : \frac{3}{4} = \frac{3}{8} \cdot \frac{4}{3} = \frac{3 \cdot 4}{8 \cdot 3} = \frac{12}{24} = \frac{1}{2}$ 16) $0,3 : \frac{3}{4} = \frac{3}{10} : \frac{3}{4} = \frac{3}{10} \cdot \frac{4}{3} = \frac{3 \cdot 4}{10 \cdot 3} = \frac{12}{30} = \frac{2}{5}$