Question

-(12+21-23) - ( 23 - 21 +10 )

Phá ngoặc rồi tính

Answer 1

-(12+21-23)-(23-21+10)

=-12-21+23-23+21-10

=-12-10=-22

Answer 2

\(-\left(12+21-23\right)-\left(23-21+10\right)\)

\(=-12-21+23-23+21-10\)

\(=-22\)

Answer 3

\(-\left(12+21-23\right)-\left(23-21+10\right)\)

\(=-12-21+23-23+21-10\)

\(=\left(-12-10\right)-\left(21-21\right)+\left(23-23\right)\)

\(=-22-0+0\)

\(=-22\)

Answer 4

22