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

1. Вычисления:

1. \( -1\frac{1}{4} \cdot (-15) = -\frac{5}{4} \cdot (-15) = \frac{75}{4} = 18\frac{3}{4} \)
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. \( 1\frac{1}{8} - 3\frac{5}{6} = \frac{9}{8} - \frac{23}{6} = \frac{27}{24} - \frac{92}{24} = -\frac{65}{24} = -2\frac{17}{24} \)

Ответ: 1) 18\(\frac{3}{4}\); 2) -10,63; 3) 0; 4) -36; 5) -2\(\frac{17}{24}\).