Question

Bỏ ngoặc rồi tinh

1/ -7264+(1543+7264)

2/ (144-97)-144

3/(-145)-(18-145)

4/ 111+(-11+27)

5/(27+514)-(486-73)

6/(36+79)+(145-79-36)

7/10-[12-(-9-1)]

8/(38-29+43)-(43+38)

9/271-[(-43)+271-(-17)]

10/-144-[29-(+144)-(+144)]

Answer 1

1) - 7264 + ( 1543 + 7264 )

= - 7264 + 1543 + 7264 

= ( - 7264 + 7264 ) + 1543

= 0 + 1543 

= 1543

2) ( 144 - 97 ) - 144

= 144 - 97 - 144

= ( 144 - 144 ) - 97

= 0 - 97 

= - 97

3) ( - 145 ) - ( 18 - 145 )

= -145 - 18 + 145

= ( - 145 + 145 ) - 18

= 0 - 18 

=  - 18 

4) 111 + ( - 11 + 27 )

= 111 - 11 + 27

= 100 + 27 

= 127 

các câu còn lại bn tự làm nha

Answer 2

1. -7264+(1543+7264)                                                     

=-7264+1543+7264

=[-7264+7264]+1543

=0

Answer 3

1,-7264+(1543+7264)=-7264+1543+7264=(-7264+7264)+1543=0+1543=1543

2,(144-97)-144=144-97-144=(144-144)-97=0-97=-97

3,(-145)-(18-145)=-145-18+145=(-145+145)-18=0-18=-18

4,111+(-11+27)=111-11+27=100+27=127

5,(27+514)-(486-73)=27+514-486+73=(27+73)+(514-486)=100+28=128

6,(36+79)+(145-79-36)=36+79+145-79-36=(36-36)+(79-79)+145=0+0+145=145

7,10-[12-(-9-1)]=10-[12+9+1]=10-12-9-1=10-10-12=0-12=-12

8,(38-29+43)-(43+38)=38-29+43-43-38=(38-38)+(43-43)-29=0+0-29=-29

9,271-[(-43)+271-(-17)]=271-[-43+271+17]=271+43-271-17=(271-271)+(43-17)=0+26=26

10,-144-[29-(+144)-(+144)]=-144-[29-144-144]=-144-[29-144-144]=-144-29+144+144=(-144+144)+(144-29)=0+115=115

Answer 4

1/ -7264 + ( 1543 + 7264 )

= -7264 + 8807

=1543

2/ (144 - 97 ) -144

= 47 - 144

= -97

3/ (-145)-(18-145)

=(-145)-127

=-272

4/ 111+(-11+27)

=111+16

=127

5/(27+514)-(486-73)

=541-413

=128

6/(36+79)+(145-79-36)

=115+30

=145

7/10-[12-(9-1)]

=10-[12-8]

=10-4

=6

8/(38-29+43)-(43+38)

=52-81

=-29

9/271-[(-43)+271-(-17)]

=271-245

=26

10/-144-[29-(+144)-(+144)]

=-144-(-259)

=115

Answer 5

mik chỉ giúp đc câu 9 thui nha

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

= 271 + 43 - 271 + 271 - 17

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

= 0 + 297 

= 297

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