1) -1,8 * 3 2) 0,8: (-1,6) 3) 1,7 - 2,38 4) 0,4 + 1,69 7 5) 7 - 3— 9 6) -4 - 5,6 5 3 7) -4 — - (-1—) 8 8 5 1 8) -1— + 4— 6 6 9) - — - — 5 12 3 5 10) - — : (—) 5 25 3 9

Пример

• 1) \(-1.8 \cdot 3 = -5.4\)

• 2) \(0.8 : (-1.6) = -0.5\)

• 3) \(1.7 - 2.38 = -0.68\)

• 4) \(0.4 + 1.69 = 2.09\)

• 5) \(7 - 3\frac{7}{9} = 6\frac{9}{9} - 3\frac{7}{9} = 3\frac{2}{9}\)

• 6) \(-4\frac{2}{5} - 5.6 = -4.4 - 5.6 = -10\)

• 7) \(-4\frac{3}{8} - (-1\frac{3}{8}) = -4\frac{3}{8} + 1\frac{3}{8} = -3\)

• 8) \(-1\frac{5}{6} + 4\frac{1}{6} = -1\frac{5}{6} + 4\frac{1}{6} = 3 - \frac{4}{6} = 3 - \frac{2}{3} = 2\frac{1}{3}\)

• 9) \(-5\frac{3}{5} - \frac{5}{12} = -5\frac{36}{60} - \frac{25}{60} = -5\frac{61}{60} = -6\frac{1}{60}\)

• 10) \(- \frac{3}{5} : (\frac{9}{25}) = - \frac{3}{5} \cdot \frac{25}{9} = - \frac{1}{1} \cdot \frac{5}{3} = -1\frac{2}{3}\)