Question

99-mở ngoặc vuông 109+(-9)

Answer 1

99-[109+(-9)]

=99-[109-9]

= 99 -100

= -1

Answer 2

    99 - [109 + ( -9 )]

=  99 - [109 - 9]

=  99 - 100

=      -1

Answer 3

99 - [ 109 + ( -9 ) ]

= 99 - [ 109 - 9 ]

= 99 - 100

= -1

Answer 4

99 - [109 + (-9)

= 99 - 100

= -1

Answer 5

=

-1

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