![](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)
a, (-17) + (-83)
= -(17 + 83)
= 100
b, 22.(-115) + 15.22 - 20220
= -22.(115 - 15) - 1
= -4.100 - 1
= -400 - 1
= -401
c, -53.(-25) + 53.(-89) + (-6)2.(-53)
= 53.25 - 53.89 - 53.36
= 53.(25 - 89 - 36)
= 53. (-100)
= - 5300
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
(-17)+14+(-12)=(-3)+(-12)=(-15)
\(5^{10}:5^8+60:12+\left(-10\right)\)
\(=5^2+5+\left(-10\right)\)
=30+(-10)=20
![](https://rs.olm.vn/images/avt/0.png?1311)
120+[55-(11-3.2)2]+12021
= 120+(55-25)+1
= 120+30-1
= 149
-329+(115-101)-(15-440)
= -329+14+425
= 100
![](https://rs.olm.vn/images/avt/0.png?1311)
Câu 2:
\(a,\Rightarrow x=-23+15=-8\\ b,\Rightarrow5\left(x+4\right)=85\\ \Rightarrow x+4=17\Rightarrow x=13\\ c,\Rightarrow5^{x+2}=24+1=25=5^2\\ \Rightarrow x+2=2\Rightarrow x=0\\ d,\Rightarrow x+4+x+5⋮9\\ \Rightarrow2x+9⋮9\\ \Rightarrow2x⋮9\Rightarrow x\in\left\{0;9\right\}\left(0< x< 10\right)\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(b, 2020^ 0 + 5^ 4 : 5^ 2 - 9.2 \)
\(=1+25-18\)
\(= 26-18=8\)
a)
(2.31.12)+(4.6.42)+(8.27.3)
=(24.31)+(24.42)+(24.27)
=24.(31+42+27)=24.100=2400
\(2^2.115-2^2.15\)
\(=2^2\left(115-15\right)\)
\(=4.100=400\)
thanks