![](https://rs.olm.vn/images/avt/0.png?1311)
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
= 300 . [(54 + 256 : 32) - 52
= 300 . [(54 + 8) - 52 ]
= 300 . (62 - 52)
= 300 . 10
= 3000
nhớ ôn lại kiến thức đi e ơi :)))
![](https://rs.olm.vn/images/avt/0.png?1311)
a: =321-21*[(2*27+16:32)-52]
=321-21*[2+0,5]
=321-21*2,5=268,5
b: \(=\dfrac{160}{17+\left[9\cdot5\left(14+8\right)\right]}\)
\(=\dfrac{160}{17+45\cdot22}=\dfrac{160}{1007}\)
c: =100*9:3^2=100
d: =2*27+143:(36-25)
=54+143:11
=54+13=67
![](https://rs.olm.vn/images/avt/0.png?1311)
\(=321-21\cdot\left[2\cdot27+256:32-52\right]\)
\(=321-21\cdot10=321-210=111\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a: \(=23\cdot100+300=2600\)
b: \(=300:\left(4+6\right)-25=30-25=5\)
![](https://rs.olm.vn/images/avt/0.png?1311)
Ta có:
452 chia a dư 32
321 chia a dư 21
Suy ra a thuộc
Vì
Vậy số tự nhiên a đó là 60.
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 100:{250:[450−(4.53−25.4)]}100:{250:[450−(4.53−25.4)]}
=100:{250:[450−(4.125−25.4)]}=100:{250:[450−(4.125−25.4)]}
=100:{250:[450−(500−100)]}=100:{250:[450−(500−100)]}
=100:[250:(450−400)]=100:[250:(450−400)]
=100:(250:50)=100:(250:50)
=100:5=100:5
=20=20
b) 4(18−15)−(5−3).324(18−15)−(5−3).32
=4.3−2.32=4.3−2.32
=4.3−2.9=4.3−2.9
=12−18=12−18
=−6=−6
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
b: \(=12\left(35\cdot173+27\right)\)
\(=12\cdot6082=72984\)
321-21.[(2.33- 44:32)-52]
=321-21.[(2.27- 256:32)-52]
=321-21.[(54-8)-52]
=321-21.[46-52]
=321-21.(-6)
=321-(-126)
=447