\(-\dfrac{5}{9}\times\dfrac{5}{11}+\dfrac{6}{9}\times\dfrac{5}{11}+\dfrac{5}{9}\)
\(=\dfrac{5}{11}\times\left(-\dfrac{5}{9}+\dfrac{6}{9}+\dfrac{5}{9}\right)\)
\(=\dfrac{5}{11}\times\dfrac{6}{9}\)
\(=\dfrac{30}{99}\)
\(=\dfrac{10}{33}\)
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Cho mình sửa lại ạ:
\(-\dfrac{5}{9}\times\dfrac{5}{11}+\dfrac{6}{9}\times\dfrac{5}{11}+\dfrac{5}{9}\)
\(=\dfrac{5}{11}\times\left(-\dfrac{5}{9}+\dfrac{6}{9}\right)+\dfrac{5}{9}\)
\(=\dfrac{5}{11}\times\dfrac{1}{9}+\dfrac{5}{9}\)
\(=\dfrac{5}{99}+\dfrac{5}{9}\)
\(=\dfrac{60}{99}\)
\(=\dfrac{20}{33}\)
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