Question

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Answer 1

7) \(1\dfrac{13}{15}\cdot0.75-\left(\dfrac{11}{20}+25\%\right):1\dfrac{2}{5}\)

\(=\dfrac{28}{15}\cdot\dfrac{3}{4}-\left(\dfrac{11}{20}+\dfrac{1}{4}\right):\dfrac{7}{5}\)

\(=\dfrac{7}{5}-\dfrac{4}{5}\cdot\dfrac{5}{7}\)

\(=\dfrac{3}{5}\cdot\dfrac{5}{7}\)

\(=\dfrac{3}{7}\)