3. Найдите значение выражения 1) \(\frac{24}{4-4.8}\) 2) \(\frac{27}{3-4.8}\) 3) \(\frac{0.8}{1-\frac{1}{9}}\) 4) \(\frac{1.5}{1+\frac{1}{5}}\) 5) -12-(-8.6)-9.4 6) -7-(-4,7)-6,8 7) 12-5-(-1,7)

1) \(\frac{24}{4-4.8} = \frac{24}{-0.8} = -30\) 2) \(\frac{27}{3-4.8} = \frac{27}{-1.8} = -15\) 3) \(\frac{0.8}{1-\frac{1}{9}} = \frac{0.8}{\frac{8}{9}} = \frac{0.8 \cdot 9}{8} = 0.1 \cdot 9 = 0.9\) 4) \(\frac{1.5}{1+\frac{1}{5}} = \frac{1.5}{\frac{6}{5}} = \frac{1.5 \cdot 5}{6} = \frac{7.5}{6} = 1.25\) 5) \(-12 - (-8.6) - 9.4 = -12 + 8.6 - 9.4 = -3.4 - 9.4 = -12.8\) 6) \(-7 - (-4.7) - 6.8 = -7 + 4.7 - 6.8 = -2.3 - 6.8 = -9.1\) 7) \(12 - 5 - (-1.7) = 12 - 5 + 1.7 = 7 + 1.7 = 8.7\) Ответ: 1) \(-30\); 2) \(-15\); 3) \(0.9\); 4) \(1.25\); 5) \(-12.8\); 6) \(-9.1\); 7) \(8.7\)