Часть 1 1. Вычислить. 1) -1 \(\frac{1}{5}\) : (-15) 2) -1,95 - 8,68 3) -7 - (-4) + 3 4) -2,16 : \(\frac{3}{50}\) 5) 1 \(\frac{1}{8}\) - 3 \(\frac{5}{6}\)

Решение:

1. \(-1\frac{1}{5} : (-15) = -\frac{6}{5} : (-15) = \frac{6}{5 \cdot 15} = \frac{6}{75} = \frac{2}{25}\)
2. \(-1,95 - 8,68 = -10,63\)
3. \(-7 - (-4) + 3 = -7 + 4 + 3 = 0\)
4. \(-2,16 : \frac{3}{50} = -2,16 \cdot \frac{50}{3} = -0,72 \cdot 50 = -36\)
5. \(1\frac{1}{8} - 3\frac{5}{6} = \frac{9}{8} - \frac{23}{6} = \frac{9 \cdot 3}{24} - \frac{23 \cdot 4}{24} = \frac{27 - 92}{24} = -\frac{65}{24} = -2\frac{17}{24}\)

Ответ: 1) \(\frac{2}{25}\); 2) \(-10,63\); 3) \(0\); 4) \(-36\); 5) \(-2\frac{17}{24}\).