Question

Tính nhanh:

1) 271 - [ - 43 - ( - 271 - 17 )]

2) 6 - 24 - 24 + 48 + 4

 

Answer 1

1) 271 - [ - 43 - ( - 271 - 17 )]

= 271 - [ - 43 + 271 + 17 ]

=271+43-271-17

=43-17

=26

2) 6 - 24 - 24 + 48 + 4

=10+48-48

=10

Answer 2

1)\(217-\left[-43-\left(-271-17\right)\right]\\ =217-\left(-43+271+17\right)\\ =217+43-271-17\\ =43-17=26\)

2)\(6-24-24+48+4=6+4=10\)

Answer 3

1) 271 - [ - 43 - ( - 271 - 17 )]

= 271 + 43 + 271 - 17

= ( 271 - 271 ) + ( 43 - 17 )

=         0           +      26

=               26

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