Вычислите: 16 * 7 - 75

1. $16 \cdot 7 - 75 = 112 - 75 = 37$ 2. $-27 + 72 : 9 = -27 + 8 = -19$ 3. $-2 \cdot (54 + 129) = -2 \cdot 183 = -366$ 4. $83 + 14 \cdot (-4) = 83 - 56 = 27$ 5. $-23 + 17 \cdot 6 = -23 + 102 = 79$ 6. $\frac{3}{5} : (\frac{4}{5} + \frac{11}{20}) = \frac{3}{5} : (\frac{16}{20} + \frac{11}{20}) = \frac{3}{5} : \frac{27}{20} = \frac{3}{5} \cdot \frac{20}{27} = \frac{1 \cdot 4}{1 \cdot 9} = \frac{4}{9}$ 7. $\frac{3}{8} : (\frac{7}{8} + \frac{15}{24}) = \frac{3}{8} : (\frac{21}{24} + \frac{15}{24}) = \frac{3}{8} : \frac{36}{24} = \frac{3}{8} : \frac{3}{2} = \frac{3}{8} \cdot \frac{2}{3} = \frac{1}{4}$ 8. $\frac{8}{9} - \frac{3}{8} : \frac{27}{28} = \frac{8}{9} - \frac{3}{8} \cdot \frac{28}{27} = \frac{8}{9} - \frac{1 \cdot 7}{2 \cdot 9} = \frac{8}{9} - \frac{7}{18} = \frac{16}{18} - \frac{7}{18} = \frac{9}{18} = \frac{1}{2}$ 9. $\frac{3}{28} \cdot (\frac{17}{18} - \frac{1}{6}) = \frac{3}{28} \cdot (\frac{17}{18} - \frac{3}{18}) = \frac{3}{28} \cdot \frac{14}{18} = \frac{1 \cdot 1}{2 \cdot 6} = \frac{1}{12}$ 10. $\frac{11}{15} - \frac{7}{8} \cdot \frac{8}{35} = \frac{11}{15} - \frac{1 \cdot 1}{1 \cdot 5} = \frac{11}{15} - \frac{3}{15} = \frac{8}{15}$ **Ответ:** 1) 37; 2) -19; 3) -366; 4) 27; 5) 79; 6) 4/9; 7) 1/4; 8) 1/2; 9) 1/12; 10) 8/15.