Question

Tính nhanh:

(25+51)+(42-25-53-51)

Answer 1

Phá ngoặc được

25+51+42-25-53-51

=42-53

=-11

hok tốt

Answer 2

( 25 + 51) + ( 42 - 25 -53 -51 )

= 76 +  ( - 87 ) 

=  - 11

Answer 3

(25+51)+(42-25-53-51)

=(25-25)+(51-51)+(53-42)

=       0 +  0         +11

= 11

Answer 4

( 25 + 51 ) + ( 42 - 25 - 53 - 51 )

= 25 + 51 + 42 - 25 - 53 - 51

= ( 51 - 51 ) + ( 25 - 25 ) + ( 42 - 53 )

= 0 + 0 + (-11)

= -11

Answer 5

(25+51)+(42-25-53-51)

=76+(-87)

=-(87-76)=-11