Question

Giúp mình bài này với:

a) \(\dfrac{4}{5}+\dfrac{4}{-18}\)

Nhanh lên nhé!

Answer 1

\(\dfrac{4}{5}+\dfrac{4}{-18}\)

\(=\dfrac{4}{5}-\dfrac{4}{18}\)

\(=\dfrac{72-20}{90}\)

\(=\dfrac{52}{90}\)

\(=\dfrac{26}{45}\)

Answer 2

\(\dfrac{4}{5}+\dfrac{4}{-18}=\dfrac{4}{5}+\dfrac{-4}{18}=\dfrac{72}{90}+\dfrac{-20}{90}=\dfrac{72+\left(-20\right)}{90}=\dfrac{52}{90}=\dfrac{26}{45}\)

Answer 3

\(\dfrac{4}{5}+\dfrac{4}{-18}\\ =\dfrac{4}{5}-\dfrac{4}{18}\\ =\dfrac{72-20}{90}=\dfrac{52}{90}\\ =\dfrac{26}{45}\)

Answer 4

a)

\(\dfrac{4}{5}+\dfrac{4}{-18}\)

\(=\dfrac{4}{5}-\dfrac{4}{18}\)

\(=\dfrac{72-20}{90}\)

\(=\dfrac{52}{90}\)

\(=\dfrac{26}{45}\)

Answer 5

a, \(\dfrac{4}{5}+\dfrac{4}{-18}=\dfrac{-72}{-90}+\dfrac{20}{-90}=\dfrac{-52}{-90}\)