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\(\left(-12\right)+\left(-13\right)+36+\left(-11\right)=\left(-12-13-11\right)+36\)
\(=\left(-36\right)+36\)
\(=0\)
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a,21.35-3.26.7
=735-546
=189
b,77-11.(30+7)
=77-407
=-330
c,85.(36-27)-35.(86-27)
=85.9-35.59
=765-2065
=1300
d,47.(43-15)-47.(45+15)
=47.28-47.60
=47.(28-60)
=47.(-32)=-1504
![](https://rs.olm.vn/images/avt/0.png?1311)
chia từng câu ra rồi mình giải cho nhé , nhiều câu quá
![](https://rs.olm.vn/images/avt/0.png?1311)
1)-7264+(1543+7264)=-7264+1543+7264=1543
2)(144-97)-144=144-97-144=-97
3)(-145)-(18-145)=-145-18+145=-18
4)111+(-11+27)=111-11+27=100+27=127
5)(27+514)-(486-73)=27+514-486-73=541-486-73=55-73=-18
6)(36+79)+(145-79-36)=36+79+145-79-36=145
7)10-[12-(-9-1)]=10-[12+9+1]=10-12-9-1=-12
8)(38-29+43)-(43+38)=38-29+43-43-38=-29
9)271-[(-43)+271-(-17)]=271-[-43+271+17]=271+43-271-17=43-17=26
10)-144-[29-(+144)-(+144)]=-144-[29-144-144]=-144-29+144+144=-29+144=115
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b: \(305+\left(-105\right)+\left(-246\right)+546\)
\(=200+300\)
=500
c: \(435+\left(-43\right)+\left(-483\right)+\left(-57\right)+383+\left(-415\right)\)
\(=20-100-100\)
=-180
![](https://rs.olm.vn/images/avt/0.png?1311)
d: \(1316+317+\left(-1216\right)+\left(-315\right)+\left(-85\right)\)
\(=100-2-85\)
=13
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mk ko ghi lại đề bài nha bạn
1. =-7624+1543+7264 = (-7264+7264)+1543
= 0+1543
= 1543
2. = 144 - 97 - 144 = ( 144 -144 ) -97
= 0-97
= 0+ (-97)
= -97
3. = -145 - 18 + 145 = (-145+145)-18
= 0-18
= 0+ (-18)
= -18
4. = 111+ (-11) + 27 = [ 111+ (-11) ] +27
= 100+27
= 127
5. = 27+ 514 - 486 + 73 = ( 27+ 73) + ( 514 - 486)
= 100 + 28
= 128
6. = 36 + 79 +145 -79 -36 = ( 36-36)+(79-79)+145
= 0+0+145
= 145
7. = 10-12-(-9)+1 = 10 + (-12) + 9 +1
= (10+9+1) +(-12)
= 20+(-12)
= 8
8. = 38 -29 +43 -43 -38 =(38-38)+(43-43)-29
= 0+0 -29
= 0+ (-29)
= -29
9. = 271 - (-43) -271 - (-17)=271+43-271+17
= (271-271) + ( 43 +17)
= 0+ 60
= 60
10. = -144 - 29 + (-144) + (-144) = -144 + (-29) + (-144) +(-144)
= [-144 + (-144)+ (-144)] + (-29)
= -144 x3 + (-29)
= -432 + (-29)
= -461
k mk nha bạn
\(27+\left(43+11\right)-43-\left(27+11\right)\)
\(=27+43+11-43-27-11\)
\(=\left(27-27\right)+\left(43-43\right)+\left(11-11\right)\)
\(=0+0+0\)
\(=0\)
27+(43+11)-43-(27+11)
= 27 + 43 + 11 - 43 - 27 -11
= ( 27 - 27 ) + ( 43 - 43 ) + ( 11-11 )
= 0 + 0 + 0
=0