![](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)
= (8.125). (25.4).33
= 1000. 100.9
= 100 000.9
= 900 000
![](https://rs.olm.vn/images/avt/0.png?1311)
a ) 2 15 b ) − 2 5 c ) 1 d ) 1 e ) − 5 3 f ) 0 g ) 2 3 5 h ) 1
![](https://rs.olm.vn/images/avt/0.png?1311)
a) \(-215+\left(-427\right)-\left(-515\right)-573\)
\(=-215+\left(-427\right)+515-573\)
\(=\left(-215+515\right)+\left(-427-573\right)\)
\(=-300+-1000=-1300\)
b) \(-68+68.\left(-76\right)+68.\left(-23\right)\)
\(=68.\left(-1\right)+68.\left(-76\right)+68.\left(-23\right)\)
\(=68.\left(-1+-76+-23\right)\)
\(=68.-10=-6800\)
![](https://rs.olm.vn/images/avt/0.png?1311)
4:
a: \(\dfrac{\left(158-x\right)}{7}=20\)
=>\(158-x=7\cdot20=140\)
=>x=158-140=18
b: \(2x-138=23\cdot32\)
=>\(2x-138=736\)
=>2x=736+138=874
=>x=437
c: \(231-\left(x-6\right)=\dfrac{1339}{13}\)
=>\(231-\left(x-6\right)=103\)
=>x-6=128
=>x=128+6=134
d: \(10+2x=\dfrac{45}{43}\)
=>\(2x=\dfrac{45}{43}-10=-\dfrac{385}{43}\)
=>\(x=-\dfrac{385}{43}:2=-\dfrac{385}{86}\)
e: \(70-5\left(2x-3\right)=45\)
=>\(5\left(2x-3\right)=70-45=25\)
=>2x-3=5
=>2x=8
=>x=4
g: \(156-\left(x+61\right)=82\)
=>x+61=156-82=74
=>x=74-61=13
![](https://rs.olm.vn/images/avt/0.png?1311)
=(1+...2005)x(125x1001x127-127x1001x125)
=(1+...2005)x0
=0
Chúc bạn học giỏi