Question

Answer 1

`[-1] / 4 + 11 / 9 - 1 / 8 + 7 / 9`

`= ( [-1] / 4 - 1 / 8 ) + ( 11 / 9 + 7 / 9 )`

`= [-3] / 8 + 2`

`= 13 / 8`

Answer 2

\(\dfrac{-1}{4}\)+\(\dfrac{11}{9}-\)\(\dfrac{1}{8}+\dfrac{7}{9}\)

= \(\left(\dfrac{-2}{8}+\dfrac{1}{8}\right)-\left(\dfrac{11}{9}+\dfrac{7}{9}\right)\)

= \(\dfrac{-1}{8}-\dfrac{18}{9}\)

= \(\dfrac{-1}{8}-\dfrac{16}{8}\)

= \(\dfrac{-17}{8}\)