448. Найдите частное: 1) 10 : 5/6; 3) 3/4 : 2; 5) 1 : 7/8; 7) 1 7/8 : 2 11/32; 2) 12 : 15/16; 4) 10/11 : 10; 6) 7 3/5 : 19/25; 8) 5 1/3 : 1 5/9.

Для решения деления нужно умножить делимое на дробь, обратную делителю. ### 448 1) $10 : \frac{5}{6} = 10 \cdot \frac{6}{5} = \frac{10 \cdot 6}{5} = 12$ 2) $12 : \frac{15}{16} = 12 \cdot \frac{16}{15} = \frac{12 \cdot 16}{15} = \frac{4 \cdot 16}{5} = \frac{64}{5} = 12\frac{4}{5}$ 3) $\frac{3}{4} : 2 = \frac{3}{4} \cdot \frac{1}{2} = \frac{3}{8}$ 4) $\frac{10}{11} : 10 = \frac{10}{11} \cdot \frac{1}{10} = \frac{1}{11}$ 5) $1 : \frac{7}{8} = 1 \cdot \frac{8}{7} = \frac{8}{7} = 1\frac{1}{7}$ 6) $7\frac{3}{5} : \frac{19}{25} = \frac{38}{5} \cdot \frac{25}{19} = \frac{38 \cdot 25}{5 \cdot 19} = 2 \cdot 5 = 10$ 7) $1\frac{7}{8} : 2\frac{11}{32} = \frac{15}{8} : \frac{75}{32} = \frac{15}{8} \cdot \frac{32}{75} = \frac{15 \cdot 32}{8 \cdot 75} = \frac{1 \cdot 4}{1 \cdot 5} = \frac{4}{5}$ 8) $5\frac{1}{3} : 1\frac{5}{9} = \frac{16}{3} : \frac{14}{9} = \frac{16}{3} \cdot \frac{9}{14} = \frac{16 \cdot 9}{3 \cdot 14} = \frac{8 \cdot 3}{1 \cdot 7} = \frac{24}{7} = 3\frac{3}{7}$ ### 449 1) $6 : \frac{7}{9} = 6 \cdot \frac{9}{7} = \frac{54}{7} = 7\frac{5}{7}$ 2) $16 : \frac{4}{11} = 16 \cdot \frac{11}{4} = 4 \cdot 11 = 44$ 3) $13 : \frac{26}{29} = 13 \cdot \frac{29}{26} = \frac{29}{2} = 14\frac{1}{2}$ 4) $\frac{7}{9} : 5 = \frac{7}{9} \cdot \frac{1}{5} = \frac{7}{45}$ 5) $\frac{9}{16} : 6 = \frac{9}{16} \cdot \frac{1}{6} = \frac{3}{16 \cdot 2} = \frac{3}{32}$ 6) $1\frac{5}{9} : 1\frac{8}{27} = \frac{14}{9} : \frac{35}{27} = \frac{14}{9} \cdot \frac{27}{35} = \frac{14 \cdot 27}{9 \cdot 35} = \frac{2 \cdot 3}{5} = \frac{6}{5} = 1\frac{1}{5}$ 7) $2\frac{10}{13} : 3\frac{3}{26} = \frac{36}{13} : \frac{81}{26} = \frac{36}{13} \cdot \frac{26}{81} = \frac{36 \cdot 26}{13 \cdot 81} = \frac{4 \cdot 2}{9} = \frac{8}{9}$ 8) $2\frac{4}{7} : 1\frac{1}{35} = \frac{18}{7} : \frac{36}{35} = \frac{18}{7} \cdot \frac{35}{36} = \frac{1 \cdot 5}{1 \cdot 2} = \frac{5}{2} = 2\frac{1}{2}$