Вычислите: 16 * 7/60 - 23/25; 9/35 * (7/24 + 1/18); 12/37 * (5/16 + 3/20); 27/34 * (3/22 + 4/33); 5/24 + 3/8 : 6/7; 2/35 + 4/15 * 8/9; 5/12 + 7/20 : 14/15; 23/32 - 13/24 * 15/26.

**8. Ответ: $1\frac{23}{25}$** 1) $16 \cdot \frac{7}{60} = \frac{16 \cdot 7}{60} = \frac{4 \cdot 7}{15} = \frac{28}{15} = 1\frac{13}{15}$ 2) $1\frac{13}{15} - \frac{23}{25} = \frac{28}{15} - \frac{23}{25} = \frac{140 - 69}{75} = \frac{71}{75}$ (Исправлено: $1\frac{13}{15} - \frac{23}{25} = \frac{28 \cdot 5 - 23 \cdot 3}{75} = \frac{140 - 69}{75} = \frac{71}{75}$) **Ответ: $\frac{71}{75}$** **9. Ответ: $\frac{1}{12}$** 1) $\frac{7}{24} + \frac{1}{18} = \frac{21 + 4}{72} = \frac{25}{72}$ 2) $\frac{9}{35} \cdot \frac{25}{72} = \frac{9 \cdot 25}{35 \cdot 72} = \frac{1 \cdot 5}{7 \cdot 8} = \frac{5}{56}$ **10. Ответ: $\frac{3}{20}$** 1) $\frac{5}{16} + \frac{3}{20} = \frac{25 + 12}{80} = \frac{37}{80}$ 2) $\frac{12}{37} \cdot \frac{37}{80} = \frac{12 \cdot 37}{37 \cdot 80} = \frac{12}{80} = \frac{3}{20}$ **11. Ответ: $\frac{21}{88}$** 1) $\frac{3}{22} + \frac{4}{33} = \frac{9 + 8}{66} = \frac{17}{66}$ 2) $\frac{27}{34} \cdot \frac{17}{66} = \frac{27 \cdot 17}{34 \cdot 66} = \frac{9 \cdot 1}{2 \cdot 22} = \frac{9}{44}$ **12. Ответ: $\frac{11}{12}$** 1) $\frac{3}{8} : \frac{6}{7} = \frac{3}{8} \cdot \frac{7}{6} = \frac{1 \cdot 7}{8 \cdot 2} = \frac{7}{16}$ 2) $\frac{5}{24} + \frac{7}{16} = \frac{10 + 21}{48} = \frac{31}{48}$ **13. Ответ: $\frac{1}{21}$** 1) $\frac{4}{15} \cdot \frac{8}{9} = \frac{32}{135}$ 2) $\frac{2}{35} + \frac{32}{135} = \frac{2 \cdot 27 + 32 \cdot 7}{945} = \frac{54 + 224}{945} = \frac{278}{945}$ **14. Ответ: $\frac{2}{3}$** 1) $\frac{7}{20} : \frac{14}{15} = \frac{7}{20} \cdot \frac{15}{14} = \frac{1 \cdot 3}{4 \cdot 2} = \frac{3}{8}$ 2) $\frac{5}{12} + \frac{3}{8} = \frac{10 + 9}{24} = \frac{19}{24}$ **15. Ответ: $\frac{11}{32}$** 1) $\frac{13}{24} \cdot \frac{15}{26} = \frac{13 \cdot 15}{24 \cdot 26} = \frac{1 \cdot 5}{8 \cdot 2} = \frac{5}{16}$ 2) $\frac{23}{32} - \frac{5}{16} = \frac{23 - 10}{32} = \frac{13}{32}$