Question

Ajuda-me..............​

Answer 1

Resposta:

$a)\frac{9}{1}*\frac{1}{2}=\frac{9}{2}=4,5\\b)\frac{68}{10}*\frac{1}{2}=\frac{68}{20}ou\frac{34}{10}=3,4\\c)\frac{20}{1}*\frac{1}{4}=(\frac{20}{4}:\frac{4}{4})=\frac{5}{1}=5\\d)\frac{30}{1}*\frac{1}{5}=(\frac{30}{5}:\frac{5}{5})=\frac{6}{1}=6$

Explicação passo-a-passo: