gercicios
$bc5,ca2$ en nimeros $e<$ $24$
a) $\dfrac {19} {3}+\left(\dfrac {-8} {3}\right)$
$b\right)$ $-$ $\dfrac {15} {4}-\left(\dfrac {7} {2}\right)$
$\dfrac {1} {y}+\dfrac {2} {3}+\dfrac {3} {9}$
d) $y2-8,24$
e) $\dfrac {9} {4}+\dfrac {1} {5}$
$\dfrac {-9} {2}$ $\dfrac {2} {15}$
$-\dfrac {5} {3}.\dfrac {3} {10}.1\dfrac {1} {5}$
$g\right)-\dfrac {5} {3}$
$l\right)$ $-\dfrac {c} {s}.$ $-1$ $\bar{18} $
$c\right)$ $\dfrac {8} {5}\div \left($ $-\dfrac {1} {2}\right)$
$\dfrac {-9} {24}\div 7\dfrac {1} {2}$