Question

Tính nhanh :

A = \(\frac{5}{7}\).  \(\frac{2}{3}\). \(\frac{7}{5}\).\(\frac{3}{2}\).\(\frac{19}{43}\)

Answer 1

\(A=\frac{5}{7}\cdot\frac{2}{3}\cdot\frac{7}{5}\cdot\frac{3}{2}\cdot\frac{19}{43}\)

   \(=(\frac{5}{7}\cdot\frac{7}{5})\cdot(\frac{2}{3}\cdot\frac{3}{2})\cdot\frac{19}{43}\)

    \(=1\cdot1\cdot\frac{19}{43}=\frac{19}{43}\)

Answer 2

A=5/7.2/3.7/5.3/2.19/43

A=5.2.7.3.19/7.3.5.2.43

A=19/43

Nhớ k cho mình nhé

Answer 3

A=5/7.2/3.7/5.3/2.19/43

A=(5/7.7/5).(2/3.3/2).19/43

A=1.1.19/43

A=19/43

~hok tốt~

Answer 4

\(\frac{5}{7}.\frac{2}{3}.\frac{7}{5}.\frac{3}{2}.\frac{19}{43}=\frac{5.2.7.3.19}{7.3.5.2.43}=\frac{19}{43}\)