Question

Bỏ ngoặc rồi tính

1, (27 + 514) - (486 - 73)

2, 10 - [12 - (-9 - 1)]

3, 271 - [(-43) + 271 - (-17)]

Answer 1

1)

=27+514-486+73

=(27+73)+(514-486)

=100+28

=128

2)

=10-(12+9+1)

=10-12-9-1

=(10-9-1)-12

=0-12

=-12

3)

=271-(-43+271+17)

=271+43-271-17

=271-271+43-17

=0+26

=26

Answer 2

`(27+514)-(486-73)`

`=27+514-486+73`

`=(27+73)+(514-486)`

`=100+28`

`=128`

__

`10-[12-(-9-1)]`

`=10-[12+9+1]`

`=10-12-9-1`

`=-2-10`

`=-12`

__

`271-[(-43)+271-(-17)]`

`=271+43-271-17`

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

`=0+26`

`=26`

Answer 3

1. 541-413=128

2.10-22=-12

3.271-245=26

Không chắc thì bạn tính lại nha

Answer 4

1) (27 + 514) - (486 - 73)

= 27 + 514 - 486 + 73

= (27 + 73) + (514 - 486)

= 100 + 28

= 128

2) 10 - [12 - (-9 - 1)]

= 10 - 12 + 9 + 1

= (10 + 9 + 1) - 11

= 20 - 12

= 8

3) 271 - [(-43) + 271 - (-17)]

= 271 + 43 - 271 - 17

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

= 0 + 26

= 26