Question

ayúdenme por favor es para un examen ​

Answer 1

Respuesta:

3

Explicación paso a paso:

*Se sabe:

  $a\frac{m}{n}=\frac{na+m}{n}$

  $\frac{b}{p}+\frac{c}{p}=\frac{b+c}{p}$

  $\frac{b}{p}-\frac{c}{p}=\frac{b-c}{p}$

*Resolviendo:

$E=(3\frac{1}{8}+2\frac{3}{8})-(5\frac{5}{8}-\frac{25}{8})$

$E=(\frac{8x3+1}{8}+\frac{8x2+3}{8})-(\frac{8x5+5}{8}-\frac{25}{8})$

$E=(\frac{24+1}{8}+\frac{16+3}{8})-(\frac{40+5}{8}-\frac{25}{8})$

$E=(\frac{25}{8}+\frac{19}{8})-(\frac{45}{8}-\frac{25}{8})$

$E=(\frac{25+19}{8})-(\frac{45-25}{8})$

$E=\frac{44}{8}-\frac{20}{8}$

$E=\frac{44-20}{8}$

$E=\frac{24}{8}$

$E=3$