Question

\(a,\frac{21}{25}\times\frac{11}{9}\times\frac{5}{7}=?\)

AI NHANH MK T CHO

 

Answer 1

a) \(\frac{21}{25}.\frac{11}{9}.\frac{5}{7}\)

\(=\frac{7.3.11.5}{5.5.3.3.7}=\frac{11}{5.3}=\frac{11}{15}\)

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Answer 2

tui ko bít làm

Answer 3

\(\frac{21}{25}\cdot\frac{11}{9}\cdot\frac{5}{7}\)

\(=\frac{3}{5}\cdot\frac{11}{9}\)

\(=\frac{11}{15}\)

Answer 4

\(a,\frac{21}{25}\)x \(\frac{11}{9}\)x\(\frac{5}{7}\)

  \(=\frac{21x11x5}{25x9x7}\)

  \(=\frac{3x11x1}{5x9x1}\)

   \(=\frac{11}{5x3}=\frac{11}{15}\)
 

Answer 5

\(\frac{21}{25}.\frac{11}{9}.\frac{5}{7}\)

\(=\frac{21.11.5}{25.9.7}\)

\(=\frac{7.3.11.5}{5.5.7.3.7}\)

\(=\frac{11}{5.3}=\frac{11}{18}\)