Question

thực hiện phép tính 

5 : 3/4 - 4 và 4/5 : 3/4

Answer 1

\(5:\dfrac{3}{4}-4=5.\dfrac{4}{3}-4=\dfrac{20}{3}-4=\dfrac{80}{12}-\dfrac{48}{12}=\dfrac{8}{3}\)

\(\dfrac{4}{5}:\dfrac{3}{4}=\dfrac{4}{5}.\dfrac{4}{3}=\dfrac{16}{15}\)

Answer 2

\(5:\dfrac{3}{4}-4\dfrac{4}{5}:\dfrac{3}{4}\)

=\(5.\dfrac{4}{3}-4\dfrac{4}{5}.\dfrac{4}{3}\)

=\(\dfrac{4}{3}.\left(5-4\dfrac{4}{5}\right)\)

=\(\dfrac{4}{3}.\left(1-\dfrac{4}{5}\right)\)=\(\dfrac{4}{3}.\dfrac{1}{5}=\dfrac{4}{15}\)

Answer 3

\(5:\dfrac{3}{4}-4=\dfrac{20}{3}-4=\dfrac{8}{3}\\ \dfrac{4}{5}:\dfrac{3}{4}=\dfrac{16}{15}\)

Answer 4

5 : \(\dfrac{3}{4}\) - 4= 5.\(\dfrac{4}{3}\) - 4= \(\dfrac{20}{3}\) - 4=\(\dfrac{8}{3}\)    ; \(\dfrac{4}{5}\) : \(\dfrac{3}{4}\)=\(\dfrac{4}{5}\) . \(\dfrac{4}{3}\) =\(\dfrac{16}{15}\)

Answer 5

\(5:\dfrac{3}{4}-4\dfrac{4}{5}:\dfrac{3}{4}\) 

\(=\left(5-\dfrac{24}{5}\right):\dfrac{3}{4}\) 

\(=\dfrac{1}{5}:\dfrac{3}{4}\) 

\(\dfrac{4}{15}\)