Question

[le trung kien]

\(\frac{-7}{25}\)x \(\frac{39}{-14}\)x \(\frac{50}{78}\)

Answer 1

[Đỗ Phương Linh]

\(\frac{-7}{25}\)x \(\frac{39}{-14}\)x\(\frac{50}{78}\)=\(\frac{\left(-7\right)x39x5x10}{5x5x\left(-7\right)x2x39x2}\)=\(\frac{10}{20}\)=\(\frac{1}{2}\)