Решение:
- \( -1\frac{1}{5} \cdot (-15) = -\frac{6}{5} \cdot (-15) = \frac{6 \cdot 15}{5} = 6 \cdot 3 = 18 \)
- \( -1,95 - 8,68 = -10,63 \)
- \( -7 - (-4) + 3 = -7 + 4 + 3 = 0 \)
- \( -2,16 : \frac{3}{50} = -2,16 \cdot \frac{50}{3} = -0,72 \cdot 50 = -36 \)
- \( 1\frac{1}{8} - 3\frac{5}{6} = \frac{9}{8} - \frac{23}{6} = \frac{27 - 92}{24} = -\frac{65}{24} = -2\frac{17}{24} \)
Ответ: 1) 18; 2) -10,63; 3) 0; 4) -36; 5) -2\(\frac{17}{24}\).