Question

8/2 + 2/5 - 1/2 - 1/10 = ?

Answer 1

$\dfrac{8}{2}+ \dfrac{2}{5}- \dfrac{1}{2}- \dfrac{1}{10}= \\ \\ \\ Poseen \ distintos \ denominadores\ entonces \ Com\'un \\ \ denominador \ es \ 10 \\ \\ \dfrac{8*5}{2*5}+ \dfrac{2*2}{5*2}- \dfrac{1*5}{2*5}- \dfrac{1}{10}= \\ \\ \\ \dfrac{40}{10}+ \dfrac{4}{10}- \dfrac{5}{10}- \dfrac{1}{10}= \dfrac{40+4-5-1}{10}= \dfrac{38}{10} \\ \\ simplificamos \ por \ 2 \\ \\ \dfrac{38}{10}= \boxed{ \dfrac{19}{5}}$



Espeor que te sirva, salu2!!!!