Question

Faça as Frações abaixo.

a)
$\frac{21}{8} \times \frac{4}{7 } =$

b)
$\frac{15}{6} \times \frac{9}{20} =$
​

Answer 1

$a) \frac{21}{8} \times \frac{4}{7} =$

$\frac{84( \div 2)}{56( \div 2)} =$

$\frac{42( \div 2)}{28( \div 2)} =$

$\frac{21( \div 7)}{14( \div 7)} =$

$\frac{3}{2} = 1.5$

$b) \frac{15}{6} \times \frac{9}{20} =$

$\frac{135( \div 3)}{120( \div 3)} =$

$\frac{45( \div 5)}{40( \div 5)} =$

$\frac{9}{8} = 1.125$