\(\left(-\dfrac{1}{3}\right)^2-\left[\left(-\dfrac{5}{2}\right)-\left(1,5-\dfrac{8}{3}\right)\right]\)
\(=\dfrac{1}{9}-\left[\left(-\dfrac{5}{2}\right)-\left(-\dfrac{7}{6}\right)\right]\)
\(=\dfrac{1}{9}-\left(-\dfrac{4}{3}\right)\)
\(=\dfrac{1}{9}+\dfrac{4}{3}\)
\(=\dfrac{1}{9}+\dfrac{12}{9}\)
\(=\dfrac{13}{9}\)
Đúng 3
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