Question

3) ( CFS) O valor da expressão 1\3 - (1\10 . 4\3 ), é: ( com o calculo )

a) 1\5 
b) 14\15 
c) 4\21
d) 7\30

Answer 1

$\frac{1}{3} - ( \frac{1}{10}* \frac{4}{3} )$

$\frac{1}{3} - \frac{4}{30}$

$\frac{1}{3/10} - \frac{4}{30/1}$

$\frac{10}{30}- \frac{4}{30}$

$\frac{6}{30} = \frac{1}{5}$