Question

2⁄5 + (-3⁄8) =




ayuda

Answer 1

Explicación paso a paso:

$\frac{2}{5}+\left(-\frac{3}{8}\right)\\\\\\\mathrm{Quitar\:los\:parentesis}:\quad \left(-a\right)=-a\\\\\\=\frac{2}{5}-\frac{3}{8}\\\\\\=\frac{16}{40}-\frac{15}{40}\\\\\\\mathrm{Ya\:que\:los\:denominadores\:son\:iguales,\:combinar\:las\:fracciones}:\quad \frac{a}{c}\pm \frac{b}{c}=\frac{a\pm \:b}{c}\\\\\\=\frac{16-15}{40}\\\\\\\mathrm{Restar:}\:16-15=1\\\\\\=\frac{1}{40}$

Date cuenta con el MCM

saludos...

$Nosenadaoficial$