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số mới là
2169:(10-1)=241
vậy số đă cho là
2410
Đáp số 2410
![](https://rs.olm.vn/images/avt/0.png?1311)
246 x 2005 - 2005 x 148 + 2005 x 102
= 2005 x (246 - 148 + 102)
= 2005 x 200
= 401000
169 : 3 + 562 : 3 + 169 : 3
= (169 + 562 + 169) : 3
= 900 : 3
= 300
201 x 2 + 201 + 201 x 3 + 201 x 4
= 201 x 2 + 201 x 1 + 201 x 3 + 201 x 4
= 201 x (2 + 1 + 3 + 4)
= 201 x 10
= 2010
![](https://rs.olm.vn/images/avt/0.png?1311)
\(2012+201-201\cdot3+201:3+2\cdot\frac{1}{4}\cdot4\)
\(=2012+\left[201-201+201\right]:3+2+\frac{1}{4}\cdot4\)
\(=2012+\left[0+201\right]:3+2\cdot\frac{1}{4}\cdot4\)
\(=2012+201:3+2\cdot\frac{1}{4}\cdot4\)
\(=2012+27+2\cdot\left[1\right]\)
\(=2012+29\cdot1\)
\(=2041\cdot1\)
\(=2041\)
Mình ko bt đúng nữa
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 36.2+36.3+36.5=36.(2+3+5)=36.10=360
b) 201+201.2+201.3+201.4=201.(1+2+3+4)=201.10=2010
Dấu . là nhân nhé
a ) 36 x 2 + 36 x 3 + 36 x 5
= 36 x ( 2 + 3 + 5 )
= 36 x 10
= 360
b ) 201 + 201 x 2 + 201 x 3 + 201 x 4
= 201 x 1 + 201 x 2 + 201 x 3 + 201 x 4
= 201 x ( 1 + 2 + 3 + 4 )
= 201 x 10
= 2010
![](https://rs.olm.vn/images/avt/0.png?1311)
\(2012+201-201\times3+201:3+2\times\frac{1}{4}\times\frac{1}{2}\times4\)
\(=2012+201\times\left(1-3+\frac{1}{3}\right)+2\times\frac{1}{2}\times4\times\frac{1}{4}\)
\(=2012+201\times\left(\frac{-5}{3}\right)+1\)
\(=2012-335+1\)
\(=1677+1\)
\(=1678\)
Học tốt
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![](https://rs.olm.vn/images/avt/0.png?1311)
(y + 201) x 3 = 2169
y + 201 = 2169 : 3
y + 201 = 723
y = 723 - 201
y = 522