(-418)- mo ngoac nhon 418 -[-418-( -418+2017)] dong ngoac nhon sory nha may cua minh ko co ngoac nhon lam on giai minh giup bai toan nay nha
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![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
Ta có: \(-418-\left\{-418-\left[-418-\left(418+2003\right)\right]\right\}\)
\(=-418-\left\{-418-\left[-418-418-2003\right]\right\}\)
\(=-418-\left\{-418+418+418+2003\right\}\)
\(=-418-\left\{418+2003\right\}\)
\(=-418-418-2003\)
\(=-2839\)
![](https://rs.olm.vn/images/avt/0.png?1311)
-418 - { -418 - [ -418 - ( -418 + 2003 ) ] }
= -418 - [ -418 - ( -418 + 418 - 2003 ) ]
= -418 - [ -418 - ( -2003 ) ]
= -418 - ( -418 + 2003 )
= -418 + 418 - 2003
= 0 - 2003
= -2003.
-418-{-418-[-418-(-418+2003)]}=-418+418+[-418-(-418+2003)]=-418-(-418+2003)=-418+418-2003=-2003
![](https://rs.olm.vn/images/avt/0.png?1311)
b, -418 - {- 418 - [ -418 - (-418) + 2021]}
= -481 - { -418 - [ 0 + 2021]}
= -481 + 418 + 2021
= 2021
d, 23 - 501 - 343 + 61 - 257 + 16 - 499
= (23 + 61 + 16) - (501 + 499) - (343 + 257)
= 100 - 1000 - 600
= 100 - 1600
= -1500
e, 743 - 231 + (-495) - (-69) - 38 + (-117)
= 512 - 426 - 155
= 86 - 155
= - 69
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
A = (15-17) - |-3| - [ (-2).3 - (-3)2 ]
A = (-2) - 3 - [ (-6) - 9 ]
A = (-5) - (-15)
A = (-5) + 15
A = 10
B = 418 + [ 418 - (418+2018) ]
B = 418 + [ 418 - 2436 ]
B = 418 + (-2018)
B = -1600
Chúc bạn học tốt!
Tran Thi Phuong Thao:
(-418) - {418 - [-418 - (-418 + 2017)]}
= (-418) - {418 - [ - 418 - 1599 ]}
= (-418) - {418 - (-2017)}
= (-418) - { 418 + 2017}
= (-418) - 2435
= -2853
:), Chúc bạn học tốt!!!
cam on nhung cau sai roi to = -2017 co