Question

Tính hợp lí:  3579 - [49-5+3579]+49

Answer 1

ta có

3579-(49-5+3579)+49

=3579-49+5-3579+49

=5

Answer 2

3579 - ( 49 - 5 + 3579 ) + 49

= 3579 - 49 + 5 - 3579 + 49

= ( 3579 - 3579 ) + ( 49 - 49 ) + 5

= 0 + 0 + 5

= 5

Answer 3

3579 - [49 - 5 + 3579] + 49

= 3579 - 49 + 5 - 3579 +49

= 5

Answer 4

3579 - [44 + 3579]+ 49

=  3579 - 3623 +49

= (-44) + 49

=5

Answer 5

3579 - [49-5+3579]+49

=[3579-3579]-[49-49]+5

=0+0+5

=5