Question

Даю 30 балов, с объяснениям

Answer 1

Ответ:

$- \frac{7}{12} + ( - \frac{11}{18} ) = - \frac{7}{12} - \frac{11}{18} = \frac{43}{36 } = - 1 \times \frac{7}{36}$

$\frac{7}{10} + ( - \frac{11}{15} ) = \frac{7}{10} - \frac{11}{15} = - \frac{1}{30}$

$- \frac{1}{6} - \frac{5}{18} = - \frac{3 + 5}{18} = - \frac{8}{18} = - \frac{4}{9}$

$- \frac{1}{5} - ( - \frac{11}{15} ) = - \frac{1}{5} + \frac{11}{15} = \frac{8}{15}$