Quoc Tran Anh Le Coordinator
07/08/2018 at 05:36-
Nguyễn Phương Uyên 07/08/2018 at 06:11\(\dfrac{1}{4\dfrac{3}{7}}+\dfrac{1}{3\dfrac{11}{13}}+\dfrac{1}{\dfrac{5}{9}}\)
\(=\dfrac{1}{\dfrac{31}{7}}+\dfrac{1}{\dfrac{50}{13}}+\dfrac{1}{\dfrac{5}{9}}\)
\(=1\div\dfrac{31}{7}+1\div\dfrac{50}{13}+1\div\dfrac{5}{9}\)
\(=\dfrac{7}{31}+\dfrac{13}{50}+\dfrac{9}{5}\)
\(=\dfrac{3543}{1550}\)
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