`4/5 +4+11/5`
`=(4/5 +11/5)+4`
`= 15/5 +4`
`=3+4`
`=7`
\(\dfrac{4}{5}+4+\dfrac{11}{5}\\ =\left(\dfrac{4}{5}+\dfrac{11}{5}\right)+4\\ =\dfrac{11+4}{5}+4\\ =\dfrac{15}{5}+4\\ =3+4=7\)
\(\dfrac{4}{5}\) + 4 + \(\dfrac{11}{5}\)
= ( \(\dfrac{4}{5}\) + \(\dfrac{11}{5}\)) + 4
= \(\dfrac{15}{5}\) + 4
= 3 + 4
= 7