Question

-1/24-[1/4-(1/2-7/8)]

Answer 1

\(-\dfrac{1}{24}-\left[\dfrac{1}{4}-\left(\dfrac{1}{2}-\dfrac{7}{8}\right)\right]\)

\(=-\dfrac{1}{24}-\left[\dfrac{1}{4}-\left(\dfrac{4}{8}-\dfrac{7}{8}\right)\right]\)

\(=-\dfrac{1}{24}-\left(\dfrac{1}{4}+\dfrac{3}{8}\right)\)

\(=-\dfrac{1}{24}-\left(\dfrac{2}{8}+\dfrac{3}{8}\right)\)

\(=-\dfrac{1}{24}-\dfrac{15}{24}=-\dfrac{2}{3}\)

Answer 2

−1/24 − [ 1/4 − (1/2−7/8) ]

= −1/24 − [ 1/4−(4/8−7/8) ]

= −1/24 − (1/4+3/8)

= −1/24 − (2/8+3/8)

=−1/24−15/24=−2/3