Question

сравните дроби 3/5 и 5/8, 10/21и 9/14
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Answer 1

$1) \ \rm\displaystyle \frac{3}{5} \ V \ \frac{5}{8} \\\\\\ \frac{3}{5} \cdot\frac{8}{8} \ V \ \frac{5}{8} \cdot \frac{5}{5} \\\\\\\frac{24}{40} <\frac{25}{40} \\\\\\ \boxed{\frac{3}{5} <\frac{5}{8} }$             $2) \ \rm\displaystyle \frac{10}{21} \ V \ \frac{9}{14 } \\\\\\ \frac{10}{21} \cdot \frac{2}{2} \ V \ \frac{9}{14} \cdot \frac{3}{3 }\\\\\\ \frac{20}{42} <\frac{27}{42} \\\\\\ \boxed{\frac{10}{21} <\frac{9}{14} }$

Пояснение :    

$\boldsymbol {\rm V} -$знак сравнения