Question

1)2/9•3/7:5/21 2)7/25:3/10•5/6

Answer 1

Ответ:

1)2/9*3/7:5/21=2/5

2)7/25:3/10*5/6=7/9

Answer 2

$1)\frac{2}{9} \times \frac{3}{7} \div \frac{5}{21} = \frac{2}{9} \times \frac{3}{7} \times \frac{21}{5} = \frac{2}{3} \times \frac{3}{5} 2 \times \frac{1}{5} = \frac{2}{5} \\ \\ 2) \frac{7}{25} \div \frac{3}{10} \times \frac{5}{6} = \frac{7}{5} \times \frac{10}{3} \times \frac{1}{6} = \frac{7}{5} \times \frac{5}{3} \times \frac{1}{3} = 7 \times \frac{1}{3} \times \frac{1}{3} = \frac{7}{9}$