Question

хто зробить тому 39балів​

Answer 1

Ответ:

Пошаговое объяснение:

$\left(-\frac{8}{19}\right)+\left(-\frac{13}{38}\right)-\frac{30}{19}=\left(-\frac{29}{38}\right)-\frac{30}{19}=\left(-2\frac{13}{38}\right)=-2\frac{13}{38}$

$\left(\frac{5}{9}-\frac{21}{33}\right)+\left(-\frac{4}{11}\right)=\left(-\frac{8}{99}\right)+\left(-\frac{4}{11}\right)=\left(-\frac{4}{9}\right)$

Answer 2

Ответ:

$1) - \frac{18}{19} + ( - \frac{13}{38} ) - \frac{30}{19} = - \frac{18}{19} - \frac{13}{38} - \frac{30}{19} = - \frac{36}{38} - \frac{13}{38} - \frac{60}{38} = \frac{ - 36 - 13 - 60}{38} = - \frac{109}{38} = - 3 \frac{3}{38} \\ 2)( \frac{5}{9} - \frac{21}{33} ) + ( - \frac{4}{11} ) = \frac{5}{9} - \frac{21}{33} - \frac{4}{11} = \frac{55 - 63 - 36}{99} = - \frac{44}{99} = - \frac{4}{9}$