Question

Answer 1

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

\(\dfrac{15}{12}=\dfrac{5}{4}\cdot\dfrac{3}{3}\)

\(\dfrac{5}{-12}=\dfrac{-5}{12}=\dfrac{-5}{4}\cdot\dfrac{1}{3}\)

\(\dfrac{-3}{-4}=\dfrac{3}{4}=\dfrac{3}{2}\cdot\dfrac{1}{2}\)

b:\(\dfrac{2}{5}=\dfrac{-1}{-5}\cdot\dfrac{-2}{-1}\)

\(\dfrac{15}{12}=\dfrac{-5}{-4}\cdot\dfrac{-3}{-3}\)

\(\dfrac{-3}{-4}=\dfrac{3}{4}=\dfrac{-3}{-2}\cdot\dfrac{-1}{-2}\)

\(\dfrac{5}{-12}=\dfrac{-5}{12}=\dfrac{1}{-4}\cdot\dfrac{-5}{-3}\)

c: \(\dfrac{2}{5}=\dfrac{1}{5}\cdot\dfrac{2}{1}\)

\(\dfrac{15}{12}=\dfrac{5}{4}=\dfrac{1}{2}\cdot\dfrac{5}{2}\)

\(\dfrac{-5}{12}=\dfrac{-5}{3}\cdot\dfrac{1}{4}\)

\(\dfrac{-3}{-4}=\dfrac{3}{4}=\dfrac{3}{2}\cdot\dfrac{1}{2}\)