Question

Tinh bang cach thuan tien:

a) \(1\dfrac{1}{2}x1\dfrac{1}{3}x1\dfrac{1}{4}\)

b) \(1\dfrac{1}{2}:1\dfrac{1}{3}:1\dfrac{1}{4}\)

 

Answer 1

a: \(1\dfrac{1}{2}\cdot1\dfrac{1}{3}\cdot1\dfrac{1}{4}\)
\(=\dfrac{3}{2}\cdot\dfrac{4}{3}\cdot\dfrac{5}{4}\)

\(=\dfrac{5}{2}\)

b: \(1\dfrac{1}{2}:1\dfrac{1}{3}:1\dfrac{1}{4}\)

\(=\dfrac{3}{2}:\dfrac{4}{3}:\dfrac{5}{4}\)

\(=\dfrac{3}{2}\cdot\dfrac{3}{4}\cdot\dfrac{4}{5}=\dfrac{9}{10}\)