Question

`-1/8-[1/4-(1/2-7/8)]`

Answer 1

\(=-\dfrac{1}{8}-\left[\dfrac{1}{4}-\dfrac{1}{2}+\dfrac{7}{8}\right]=-\dfrac{1}{8}-\dfrac{1}{4}+\dfrac{1}{2}-\dfrac{7}{8}=-\dfrac{3}{4}\)

Answer 2

\(-\dfrac{1}{8}-\left[\dfrac{1}{4}-\left(\dfrac{1}{2}-\dfrac{7}{8}\right)\right]\)

\(=-\dfrac{1}{8}-\left[\dfrac{1}{4}-\left(-\dfrac{3}{8}\right)\right]\)

\(=-\dfrac{1}{8}-\left(\dfrac{1}{4}+\dfrac{3}{8}\right)\)

\(=-\dfrac{1}{8}-\dfrac{5}{8}=-\dfrac{3}{4}\)

Answer 3

\(-\dfrac{1}{8}-\left[\dfrac{1}{4}-\left(\dfrac{1}{2}-\dfrac{7}{8}\right)\right]=-\dfrac{1}{8}-\left[\dfrac{1}{4}-\left(-\dfrac{5}{8}\right)\right]=-\dfrac{1}{8}-\dfrac{7}{8}=-\dfrac{8}{8}=-1\)