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Đáp án+Giải thích các bước giải:

$\dfrac{6}{21}$ - $\dfrac{-12}{44}$ + $\dfrac{10}{14}$ - $\dfrac{1}{-4}$ - $\dfrac{18}{33}$

=$\dfrac{2}{7}$- $\dfrac{-3}{11}$ + $\dfrac{5}{7}$ - $\dfrac{-1}{4}$ - $\dfrac{6}{11}$

=$\dfrac{2}{7}$+ $\dfrac{5}{7}$ - $\dfrac{-1}{4}$ - $\dfrac{6}{11}$- $\dfrac{-3}{11}$

=1 - $\dfrac{-1}{4}$ - $\dfrac{6}{11}$ + $\dfrac{3}{11}$

=1 - $\dfrac{-1}{4}$ - $\dfrac{3}{11}$

=1 + $\dfrac{1}{4}$ - $\dfrac{3}{11}$

=$\dfrac{5}{4}$ - $\dfrac{3}{11}$

=$\dfrac{5}{4}$ - $\dfrac{3}{11}$

=$\dfrac{43}{44}$