Question

ayuda
$\frac{1}{2} + \frac{5}{2} =$
$\frac{10}{7} - \frac{3}{7} =$
$\frac{2}{13} + \frac{8}{13} - \frac{4}{13} =$

Answer 1

Ayuda

$\mathrm{Aplicar\:la\:regla}\:\frac{a}{c}\pm \frac{b}{c}=\frac{a\pm \:b}{c}$

$\frac{1}{2}+\frac{5}{2}=\frac{1+5}{2}=\frac{6}{2}=3$

$\frac{10}{7}-\frac{3}{7}=\frac{10-3}{7}=\frac{7}{7}=1$

$\frac{2}{13}+\frac{8}{13}-\frac{4}{13}=\frac{2+8-4}{13}=\frac{6}{13}$