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a) 20.16+20.35+20.49
=20.(16+35+49)
=20.100=2000
b) 5.(|-13|-500)+|-2017|
=5.(13-500)+2017
=5.(13-1)+2017
=5.12+2017
=60+2017=2077
c) (24.22-32.7)2017
=(16.4-9.7)2017
=(64-63)2017
=12017=1
d) 160:{180-[36-(22.16-22.12)]}
= 160:{180-[36-(4.16-4.12)]}
=160:{180-[36-4(16-12)]}
=
160:{180-[36-4.4]}
=
160:{180-[36-16
]}
=160:
{180-20
}
=160:160=1
Ta có \(1728:\left(31-3^2\right)^2+2282:163.3^3-3^3.2017^0\)
\(=1728:\left(31-9\right)^2+2282:163.27-27.1\)
\(=1728:22^2+14.27-27\)
\(=1728:484+27.\left(14-1\right)\)
\(=\frac{432}{121}+351=\frac{432}{121}+\frac{42471}{121}=\frac{42903}{121}\)
2412 : 2412 + 2 . 22 - 94 : 93 + 50 .16
= 1 + 2^3 - 9 + 16
= 1 +8 -9 +16
= 16
\(24^{12}:24^{12}+2.2^2-9^4:9^3+5^0.16\)
\(=1+2^3-9+1.16\)
\(=1+8-9+16\)
\(=16\)
Ủng hộ nha
1)=>3(x-5)(2x+9)+3(x-5)=0=>(x-5)(6x+30)
=>x-5=0=>x=5
6x+30=0=>x=-5
2)=>x^2-16=0=>x=+-4
12-4x=0=>x=3
3)=>9-x^2=0=>x=+-3
4x-8=0=>x=2
4)=>8-x^3=0=>x=3
5^x-125=0=>x=2
5)=>2^x.2^x=8=>2^2x=8=>2x=3=>x=1,5
Trl :
Làm theo tính toán từ trong ra ngoài -_-
\(256+619-\left(619+16\right)\)
\(=256+619-635\)
\(=875-635\)
\(=240\)
\(286:\left\{\left[\left(163+317\right):12-9\right]+112\right\}+2017^0\)
\(=286:\left\{\left[480:12-9\right]+112\right\}+1\)
\(=286:\left\{\left[40-9\right]+112\right\}+1\)
\(=286:\left\{31+112\right\}+1\)
\(=286:143+1\)
\(=2+1\)
\(=3\)