![](https://rs.olm.vn/images/avt/0.png?1311)
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![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(2345-1000:\left(19-2\left(21-18\right)^2\right)\)
\(2345-1000:\left(19-2.3^2\right)\)
\(2345-1000:\left(19-2.9\right)\)
\(2345-1000:\left(19-18\right)\)
\(2345-1000:1\)
\(2345-1000\)
\(1345\)
2345 - 1000 : [ 19 - 2 ( 21 - 18 )2 ]
= 2345 - 1000 : ( 19 - 2.32 )
= 2345 - 1000 : ( 19 - 2.9 )
= 2345 - 1000 : ( 19 - 18 )
= 2345 - 1000 : 1
= 2345 - 1000
= 1345
![](https://rs.olm.vn/images/avt/0.png?1311)
\(2345-1000:\left[19-2.\left(21-18\right)^2\right]\)
\(=2345-1000:\left[19-2.3^2\right]\)
\(=2345-1000:\left[19-2.9\right]\)
\(=2345-1000:\left[19-18\right]\)
\(=2345-1000:1\)
\(=2345-1000\)
\(=1345\)
2345 - 1000 : {19-2.(21-18 )2 }
=2345 - 1000 : {19-2.9}
=2345 - 1000 : {19 - (2 .9)}
=2345 - 1000
=1345
Không biết mình làm đúng không vì mình làm toán hơi dở. ^_^
![](https://rs.olm.vn/images/avt/0.png?1311)
\(2345-1000:\left[19-2\times\left(21-18\right)^2\right]\)
\(=2345-1000:\left[19-2\times3^2\right]\)
\(=2345-1000:\left[19-18\right]\)
\(=2345-1000\)
\(=1345\)
2345-1000:[19-2(21-18)2]
= 2345-1000:(19-2.32)
= 2345-1000:(19-2.9)
= 2345-1000:(19-18)
= 2345-1000:1
= 2345 - 1000
= 1345
![](https://rs.olm.vn/images/avt/0.png?1311)
= 2345- 1000:[19-2.32]
=2345- 1000:[19-2.9]
=2345-1000:[19-18]
=2345-1000:1
=2345-1000=1345
![](https://rs.olm.vn/images/avt/0.png?1311)
2345-1000:[19-2(21-18)2]
= 2345 - 1000 : [19-2x32 ]
=2345-1000 : [19 - 2x9]
= 2345 - 1000 : [19 - 18]
= 2345 - 1000 : 1
= 2345 -1000
= 1345
\(2345-1000\div\text{ }\left[19-2\left(21-18\right)^2\right]\)
\(=2345-1000\div\left(19-2.3^2\right)\)
\(=2345-1000\div\left(19-2.9\right)\)
\(=2345-1000\div\left(19-18\right)\)
\(=2345-1000\div1\)
\(=2345-1000\)
\(=1345\)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
2345-1000:(19-2.(21-18)^2)
= 2345 - 1000 : (19 - 2.32)
= 2345 - 1000 : (19 - 2.9)
= 2345 - 1000 : 1
= 2345 - 1000
= 1345
HỌC TỐT
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 2345 − 1000 : [19-2(21-18) 2 ]=2345-1000:1=1345
b) 205 − [ 1200 − ( 4 2 − 2.3 ) 3 ]=205-( 1200 − 1000 ) = 5
Ta có :\(2345-1000:\left[19-2\left(21-18\right)^2\right]\)
\(=2345-1000:\left(19-2.3^2\right)\)
\(=2345-1000:\left(19-18\right)=2345-1000:1\)
\(=2345-1000=1345\)