Đáp án:
$\text{ A, $\dfrac{6}{8}$ x $\dfrac{24}{12}$ x $\dfrac{2}{3}$ }$
$\text{= $\dfrac{24}{12}$ x ( $\dfrac{6}{8}$ x $\dfrac{2}{3}$) }$
$\text{= 2 x $\dfrac{1}{2}$ }$
$\text{= $\dfrac{2}{2}$ }$
$\text{= 1 }$
$\text{B $\dfrac{2}{8}$ + $\dfrac{11}{3}$ + $\dfrac{6}{8}$ - $\dfrac{8}{3}$ }$
$\text{= ( $\dfrac{2}{8}$ + $\dfrac{6}{8}$) + ($\dfrac{11}{3}$ - $\dfrac{8}{3}$) }$
$\text{ = 1 + 1 }$
$\text{ = 2}$