Question

24/36*(1/2+7/12) -8/9:10/21​

Answer 1

Ответ:

$\frac{24}{36} ( \frac{1}{2} + \frac{7}{12} ) - \frac{8}{9} \div \frac{10}{21} = \\ \frac{24}{36} ( \frac{6}{12} + \frac{7}{12} ) - \frac{8}{9} \times \frac{21}{10} = \\ \frac{24}{36} \times \frac{13}{12} - \frac{8}{9} \times \frac{21}{10} = \\ \frac{2}{36} \times 13 - \frac{4}{3} \times \frac{7}{5} = \\ \frac{1}{18} \times 13 - \frac{28}{15} = \\ \frac{1}{18} \times \frac{13}{1} - \frac{28}{15} = \frac{13}{18 } - \frac{28}{15} = \\ \frac{65}{90} - \frac{168}{90} = - \frac{103}{90} = 1 \frac{13}{90}$