Question

обчисли значення виразу 21/46×(11-2 4/5×1 4/21)=​

Answer 1

$\frac{21}{46} \times (11 - 2 \frac{4}{5} \times 1 \frac{4}{21} ) = \frac{21}{46} \times ( 11 - \frac{14}{5} \times \frac{4}{21} ) = \frac{21}{46} \times (11 - \frac{2}{5} \times \frac{4}{3} ) = \frac{21}{46} \times (11 - \frac{8}{15} ) = \frac{21}{46} \times \frac{157}{15} =$

21 и 15 сокращаем на 3

$\frac{7}{46} \times \frac{157}{5} = \frac{1099}{230} = 4 \frac{179}{230}$