Question

Значения выражения 2/9+4/21:3/7

Answer 1

Ответ:

$\frac{2}{9} + \frac{4}{21} \div \frac{3}{7} = \frac{2}{9} + \frac{4}{21} \times \frac{7}{3} = \frac{2}{9} + \frac{4}{3} \times \frac{1}{3} = \frac{2}{9} + \frac{4}{9} = \frac{6}{9} = \frac{2}{3}$