Вычисли значение выражений: a) -46+(-18)

- a) $-46 + (-18) = -46 - 18 = -64$ - б) $-8 + (-12) = -8 - 12 = -20$ - в) $-144 + (-56) = -144 - 56 = -200$ - г) $-6.4 + (-3.6) = -6.4 - 3.6 = -10$ - д) $-5.8 + (-1.8) = -5.8 - 1.8 = -7.6$ - е) $-3.74 + (-1.74) = -3.74 - 1.74 = -5.48$ - ж) $-\frac{3}{5} + (-\frac{1}{5}) = -\frac{3}{5} - \frac{1}{5} = -\frac{4}{5}$ - з) $-\frac{2}{3} + (-\frac{3}{5}) = -\frac{2}{3} - \frac{3}{5} = -\frac{10}{15} - \frac{9}{15} = -\frac{19}{15} = -1\frac{4}{15}$ - и) $-\frac{4}{5} + (-\frac{5}{6}) = -\frac{4}{5} - \frac{5}{6} = -\frac{24}{30} - \frac{25}{30} = -\frac{49}{30} = -1\frac{19}{30}$ - к) $-3\frac{1}{7} + (-1\frac{3}{14}) = -3\frac{1}{7} - 1\frac{3}{14} = -3\frac{2}{14} - 1\frac{3}{14} = -4\frac{5}{14}$ - л) $-1\frac{2}{5} + (-2.8) = -1\frac{2}{5} - 2.8 = -1.4 - 2.8 = -4.2$ - м) $-1\frac{1}{3} + (-2.25) = -1\frac{1}{3} - 2.25 = -1.333... - 2.25 = -3.583...$