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\(\left(100+42\right).42+\left(200-58\right).58\)
\(=142.42+142.58\)
\(=142.\left(42+58\right)\)
\(=142.100\)
\(=14200\)
k nha
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132*99 + 132 = 132 * 100 = 13200
168*168-168*58/110 = 168*(168-58)/110 = 168*110/110 = 168
![](https://rs.olm.vn/images/avt/0.png?1311)
(100 + 42).42 + (200 - 58).58
= 142.42 + 142.58
= 142.(42 + 58)
= 142.100
= 14200
![](https://rs.olm.vn/images/avt/0.png?1311)
58 x 32 + 32 x 8 + 16 x 5
= 32 x ( 58 + 32 ) + 16 x 5
=32 x 90 + 16 x 5
= 16 x 2 x 90 + 16 x 5
= 16 x 180 + 16 x 5
= 16 x ( 180 + 5 )
= 16 x 185
= 2960
\(58.32+32.8+16.5\)
\(=16.116+16.16+16.5\)
\(=16.\left(116+16+5\right)\)
\(=16.137\)
\(=2192\)
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a)58(-45+-24)+-69.42
=58.(-69)+(-69).42
=-69.(58+42)
=-69.100
=-6900
a;
A= 58.(-45) + (-58).24 + (-69).42
A = -58.(45 + 24) - 69.42
A =-58.69 - 69.42
A = -69.(58 + 42)
A = -69.100
A = -6900
b; 139 - (-65 + 239) - (85 + 120)
B = 139 + 65 - 239 - 85 - 120
B = -(239 - 139) - (85 - 65) - 120
B = - 100 - 20 - 120
B = - 120 - 120
B = - 240
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a.58+42+32+58+72+42 b.133:7+154:7+413:7:4
=(58+42)+(58+42)+72+32 =133:7+154:7+413:4:7
=100+100+72+32 = 133:7+154:7+103,25 :7
=200+104 = (133+154+103,25):7
=304 = 390,25:7
= 55.75
![](https://rs.olm.vn/images/avt/0.png?1311)
45-58+(-45)+(+58)-3=45-58-45+58-3=(45-45)+(58-58)-3=-3
(-57)-(-12)+3-(-57)=-57+12+3+57=(-57+57)+12+3=15
-(-24)-(-30)+(-24)-30+8=24+30-24-30+8=(24-24)+(30-30)+8=8
-(-12)+(+19)-(+12)+8-19=12+19-12+8-19=(12-12)+(19-19)+8=8
47-(-53)+(-47)-(+53)=47+53-47-53=(47-47)+(53-53)=0
-(+28)+32-(-28)+(-34)=-28+32+28-34=(-28+28)-(34-32)=-2
15-(+72)+(-15)+(+72)=15-72-15+72=(15-15)+(72-72)=0
20-(+46)+(-25)-(-46)=20-46-25+46=(20-25)+(46-46)=-5
28-(-32)+(-28)-32+5=28+32-28-32+5=(28-28)+(32-32)+5=5
-75+(-49)+(+75)+49-12=-75-49+75+49-12=(-75+75)+(49-49)-12=-12
\(...=45-58-45+58-3=-3\)
\(...=-57+12+3+57=15\)
\(...=24+30-24-30+8=8\)
\(...=12+19-12+8-19=8\)
\(...=47+53-47-53=0\)
\(...=-28+32+28-34=-2\)
\(...=15-72-15+72=0\)
\(...=20-46-25+46=-5\)
\(=...28+32-28-32+5=5\)
\(...=-75-49+75+49-12=-12\)
![](https://rs.olm.vn/images/avt/0.png?1311)
guip mk voi nhe bai nay mai mk kiem tra nha m.n cam on m.n truoc nha :))
cho mình hỏi là bạn có ghi nhầm đề ko ??
8 + 7,3^2
mình nghĩ nên ghi là 7.3^2 hơn ,
-(32 - 58) + 132 - (200 + 58)
=-(--26)+132-258
=26+132-258=26
bằng -100