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

Решение:

1. \( -1 \frac{4}{5} \cdot (-15) = -\frac{9}{5} \cdot (-15) = \frac{9 15}{5} = 9 3 = 27 \)
2. \( -1,95 - 8,68 = -10,63 \)
3. \( -7 - (-4) + 3 = -7 + 4 + 3 = -3 + 3 = 0 \)
4. \( -2,16 : \frac{3}{50} = -2,16 \frac{50}{3} = - \frac{216}{100} \frac{50}{3} = - \frac{216 50}{100 3} = - \frac{10800}{300} = -36 \)
5. \( 1 \frac{1}{8} - 3 \frac{5}{6} = \frac{9}{8} - \frac{23}{6} = \frac{9 3 - 23 4}{24} = \frac{27 - 92}{24} = -\frac{65}{24} = -2 \frac{17}{24} \)

Ответ: 1) 27, 2) -10,63, 3) 0, 4) -36, 5) -2 \( \frac{17}{24} \).