Question

Tính:

c) \(\dfrac{12}{25}\cdot\dfrac{-5}{24}\)             d) \(\dfrac{8}{15}:\dfrac{-4}{9}\)

Answer 1

\(c,\dfrac{12}{25}.\dfrac{-5}{24}=\dfrac{-60}{600}=-\dfrac{1}{10}\\ d,\dfrac{8}{15}:\dfrac{-4}{9}=\dfrac{8}{15}.\dfrac{9}{-4}=\dfrac{72}{-60}=-\dfrac{6}{5}\)

Answer 2

c) \(\dfrac{12}{25}.\dfrac{-5}{24}=\dfrac{12.\left(-5\right)}{25.24}=-\dfrac{1}{10}\)

d) \(\dfrac{8}{15}:\dfrac{-4}{9}=\dfrac{8}{15}\times\dfrac{-9}{4}=-\dfrac{6}{5}\)

Answer 3

a) \(\dfrac{12}{25}.\dfrac{-5}{24}=\dfrac{1.-1}{5.2}=\dfrac{-1}{10}\)

b) \(\dfrac{8}{15}:\dfrac{-4}{9}=\dfrac{8}{15}x\dfrac{-9}{4}=\dfrac{2.-3}{5.1}=\dfrac{-6}{5}\)