Question

tính hợp lí:
(5672-97)-5672

Answer 1

5672-97-5672

=5672-5672-97

=0-97

=-97

Answer 2

(5672-97)-5672

= 5672 -97 - 5672

= ( 5672 - 5672)  - 97

= 0 - 97

= - 97

 

Answer 3

(5672-97)-5672

=5672-97-5672

=(5672-5672)-97

=0-97

=-97

Answer 4

=(5672-5672)-97

=0-97

=-97