Question

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3/5 -20/9:5/18 + 2,4

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Answer 1

\(\dfrac{3}{5}-\dfrac{20}{9}:\dfrac{5}{18}+\dfrac{2}{4}\)

\(=\dfrac{3}{5}-\dfrac{20}{9}\times\dfrac{18}{5}+\dfrac{1}{2}\)

\(=\dfrac{3}{5}-\dfrac{360}{45}+\dfrac{1}{2}\)

\(=\dfrac{3}{5}-8+\dfrac{1}{2}\)

\(=-\dfrac{37}{5}+\dfrac{1}{2}\)

\(=-\dfrac{69}{10}\)

 

Answer 2

\(\dfrac{3}{5}-\dfrac{20}{9}:\dfrac{5}{18}+2,4\)

\(=\dfrac{3}{5}-8+\dfrac{7}{5}\)

\(=\left(\dfrac{3}{5}+\dfrac{7}{5}\right)-8\)

\(=2-8\)

\(=-6\)