Question

[Khổng Minh Tung]

-123-{-123-[-123-(-123)]}

Answer 1

[Nguyễn Văn Trọng]

-123-{-123-[-123-(-123)]}

=-123-{-123-0}

=-123-(-123)

=0

Answer 2

[nguyễn ánh hằng]

\(=-123-\left(-123-\left(-123+123\right)\right)\)

\(=-123+123=0\)