Question

expressão numerica com fração

 

1+0,19:(4-08:0,5-1)

4                             2

resposta paso a paso

R:7

    5

Answer 1

Observemos que:

 

$0,19=\dfrac{19}{100}$

 

$0,8=\dfrac{8}{10}$

 

$0,5=\dfrac{5}{10}$

 

Seja $\text{X}=\dfrac{1}{4}+\dfrac{19}{100}\div(4-\dfrac{8}{10}\div\dfrac{5}{10}-\dfrac{1}{2})$

 

Desta maneira, temos:

 

$\text{X}=\dfrac{1}{4}+\dfrac{19}{100}\div(4-\dfrac{8}{5}-\dfrac{1}{2})$

 

Donde, obtemos:

 

$\text{X}=\dfrac{1}{4}+\dfrac{19}{100}\div\dfrac{19}{10}$

 

Contudo, podemos afirmar que:

 

$\text{X}=\dfrac{1}{4}+\dfrac{1}{10}$

 

$\text{X}=\dfrac{5+2}{20}=\dfrac{7}{20}$

Answer 2

1/4+0,19(4-0,8:0,5-1/2) = 1/4+19/100:(4-8/10:5/10-1/2) = 1/4+19/100:(19/10)1/4+1/10=7/20        obs:0,19=19/100                                     0,8=8/10              0,5=5/10                                           a resposta é 7/20