24/59(1/2+7/12)-8/9*10/21​

$\frac{24}{59} \times ( \frac{1}{2} + \frac{7}{12} ) - \frac{8}{9} \times \frac{10}{21}$

решаем по действиям :

$1) \frac{1}{2} + \frac{7}{12} = \frac{6}{12} + \frac{7}{12} = \frac{13}{12} = 1 \frac{1}{12}$

$2) \frac{8}{9} \times \frac{10}{21} = \frac{80}{189}$

$3) \frac{24}{59} \times 1 \frac{1}{12} = \frac{24}{59} \times \frac{13}{12} = \frac{312}{708} = \frac{26}{59}$

$4) \frac{26}{59} - \frac{80}{189} = \frac{4914}{11151} - \frac{4720}{11151} = \frac{194}{11151}$

Ответ :

$\frac{194}{11151}$

24/59(1/2+7/12)-8/9*10/21