Question

[GT 6916]

Tính(Tính nhanh nếu có thể):

\(16\frac{2}{7}:\left(\frac{-3}{5}\right)-28\frac{2}{7}:\left(\frac{-3}{5}\right)\)

Answer 1

[Emma Granger]

\(=\left(16\frac{2}{7}-28\frac{2}{7}\right):\left(-\frac{3}{5}\right)\)
\(=-12\div\left(-\frac{3}{5}\right)=20\)

Answer 2

[Nguyễn Quốc Khánh]

\(16\frac{2}{7}:\left(\frac{-3}{5}\right)-28\frac{2}{7}:\left(\frac{-3}{5}\right)\)

\(=16\frac{2}{7}.\left(\frac{-5}{3}\right)-28\frac{2}{7}.\left(\frac{-5}{3}\right)\)

\(=\left(16\frac{2}{7}-28\frac{2}{7}\right).\left(\frac{-5}{3}\right)\)

\(=\left(-12\right).\left(\frac{-5}{3}\right)\)\(=20\)

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