Question

Tính hợp lí :

-5 + ( -37 - 45 + 51 ) - ( -37 + 51 ) 

-(15 - 47 + 58 ) + ( 15 - 47 ) +3

Help me 

:(

Answer 1

-5 + ( -37 - 45 + 51 ) - ( -37 + 51 ) 

=-5+ -37 - 45 + 51- -37 + 51 

=(37+(-37) +(51-(-51) + (45 - (-5)

=0+0+50

=50

Answer 2

  -5 + ( -37 - 45 + 51 ) - ( -37 + 51 )

=-5 + (-45) + ( -37 + 51 ) - ( -37 + 51 )

=-50

  -(15 - 47 + 58 ) + ( 15 - 47 ) + 3

=-(15 - 47) -58 + (15 - 47 ) + 3

=-58 + 3=-55