Question

Bỏ dấu ngoặc rồi tính

(45+120)+(2012-120-45)

 

Answer 1

( 45 + 120 ) + ( 2012 - 120 - 45 )

= 45 + 120 +  2012 - 120 - 45

= ( 45 - 45 ) + ( 120 - 120 ) + 2012

= 0 + 0 + 2012

= 2012

Answer 2

(45 + 120) + (2012 - 120 - 45)

= 45 + 120 + 2012 - 120 - 45

= (45 - 45) + (120 - 120) + 2012

= 0 + 0 + 2012

= 2012