Question

номер 1007 все номера

Answer 1

здравствуйте.

$1) \: - 1 \frac{3}{5} + ( - 2 \frac{5}{6} ) = - 1 \frac{18}{30} - 2 \frac{25}{30} = - 3 \frac{43}{30} = - 4 \frac{13}{30}$
$2) \: - 5 \frac{7}{15} + ( - 8 \frac{3}{10} ) = - 5 \frac{14}{30} - 8 \frac{9}{30} = - 13\frac{23}{30}$
$3) \: - 4 \frac{9}{14} + ( - 2 \frac{4}{21} ) = - 4 \frac{27}{42} - 2 \frac{8}{42} = - 6 \frac{35}{42} = - 6 \frac{5}{6}$
$4) \: - 0.85 + ( - 4 \frac{1}{2} ) = - 0.85 - 4.5 = - 5.35$
$5) \: - 4 \frac{3}{10} + ( - 1.2) = - 4.3 - 1.2 = - 5.5$
$6) \: - 5.15 + ( - 2 \frac{1}{4} ) = - 5.15 - 2.25 = - 7.4$

удачи.