Решение:
- \(-1,7 \cdot 16 = -27,2\)
- \(-1,3 - 7,9 = -9,2\)
- \(-5 - (-2) + 3 = -5 + 2 + 3 = 0\)
- \(-3\frac{3}{5} : 2\frac{7}{10} = -\frac{18}{5} : \frac{27}{10} = -\frac{18}{5} \cdot \frac{10}{27} = -\frac{18 \cdot 10}{5 \cdot 27} = -\frac{2 \cdot 9 \cdot 2 \cdot 5}{5 \cdot 3 \cdot 9} = -\frac{4}{3}\)
- \(1\frac{1}{8} + \frac{3}{7} = \frac{9}{8} + \frac{3}{7} = \frac{9 \cdot 7 + 3 \cdot 8}{56} = \frac{63 + 24}{56} = \frac{87}{56}\)
Ответ: 1) -27,2; 2) -9,2; 3) 0; 4) -\(\frac{4}{3}\); 5) \(\frac{87}{56}\).