Đáp án:
Giải thích các bước giải:
$a, (-\dfrac{24}{11}) +(-\dfrac{19}{13})+\dfrac{2}{11}+(-\dfrac{20}{13})$
= $[(-\dfrac{24}{11}) +\dfrac{2}{11}]+[(-\dfrac{19}{13})+(-\dfrac{20}{13})]$
= $ (-\dfrac{22}{11}) +(-\dfrac{39}{13})= (-2) + (-3)= -5$
$b, |-\dfrac{3}{4}+1|-\dfrac{1}{5}+|\dfrac{1}{10}-\dfrac{3}{2}|$
= $|-\dfrac{3}{4}+\dfrac{4}{4}|-\dfrac{1}{5}+|\dfrac{1}{10}-\dfrac{15}{10}|$
= $|\dfrac{1}{4}|-\dfrac{1}{5}+|-\dfrac{14}{10}|$
= $\dfrac{1}{4}-\dfrac{1}{5}+\dfrac{14}{10}$
= $\dfrac{5-4+28}{20}= \dfrac{29}{20}$
$\text { XIN HAY NHẤT ~~~}$
