2 câu trả lời
$\dfrac{5}{16}-\dfrac{5}{24}$
$=\dfrac{15}{48}-\dfrac{10}{48}$
$=\dfrac{15-10}{48}$
$=\dfrac{5}{48}$
____________________
$\dfrac{1}{3}-\dfrac{2}{-3}$
$=\dfrac{1}{3}-\left(-\dfrac{2}{3}\right)$
$=\dfrac{1}{3}+\dfrac{2}{3}$
$=\dfrac{1+2}{3}$
$=\dfrac{3}{3}$
$=1$
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