Question

resolva as frações.
a)2×2/5=

b)4×2/7=

c)5×8/2=

d)9×9/2=​

Answer 1

Resolva as frações:

$a) \: 2 \times \frac{2}{5} = \\ \\ \frac{2}{\color{red} { 1}} \times \frac{2}{5} = \\ \\ \frac{2 \times 2}{1 \times 5} = \\ \\ \bf{ \frac{4}{5} }$

$b) \: 4 \times \frac{2}{7} = \\ \\ \frac{4}{\color{red} { 1}} \times \frac{2}{7} = \\ \\ \frac{4 \times 2}{1 \times 7} = \\ \\ \bf{ \frac{8}{7} }$

$c) \: 5 \times \frac{8}{2} = \\ \\ \frac{5}{\color{red} {1 }} \times \frac{8}{2} = \\ \\ \frac{5 \times 8}{1 \times 2} = \\ \\ \frac{40}{2} = \\ \\ \bf{20}$

$d) \: 9 \times \frac{9}{2} = \\ \\ \frac{9}{\color{red} {1 }} \times \frac{9}{2} = \\ \\ \frac{9 \times 9}{1 \times 2} = \\ \\ \bf{\frac{81}{2}}$

Espero ter ajudado! :)