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a) \(x^5\cdot x^3\cdot x^2=x^{5+3+2}=x^{10}\)
b) \(\left(0,2\right)^8:0,04=\left(0,2\right)^8:\left(0,2\right)^2=\left(0,2\right)^{8-2}=\left(0,2\right)^6\)
CHÚC BẠN HỌC TỐT!!!!!!!!!!!
a)x^5.x^3.x^2=x^5+3+2=x^10
b)0,2^8:0,04=0,2^8:0,2^2=0,2^8-2=0,2^6
![](https://rs.olm.vn/images/avt/0.png?1311)
\(0,5=\dfrac{1}{2}\)
\(1,\left(45\right)=\dfrac{16}{11}\)
\(0,2\left(13\right)=\dfrac{211}{990}\)
\(0,04\left(3\right)=\dfrac{13}{300}\)
Ta có:
\(0,5=\dfrac{1}{2}\)
\(1,\left(45\right)=1+0,\left(45\right)=1+45.0,\left(01\right)\)
\(=1+45.\dfrac{1}{99}=\dfrac{16}{11}\)
\(0,2\left(13\right)=0,2+0,0\left(13\right)=0,2+0,\left(13\right):10\)
\(=0,2+0,\left(01\right).13:10=0,2+\dfrac{1}{99}.13:10=\dfrac{211}{990}\)
\(0,04\left(3\right)=0,04+0,00\left(3\right)\)
\(=0,04+0,\left(3\right):100=0,04+0,\left(1\right).3:100\)
\(=0,04+\dfrac{1}{9}.3:100=\dfrac{13}{300}\)
Chúc bạn học tốt!!!
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a) \(\frac{8^{10}}{4^8}=\frac{\left(2^3\right)^{10}}{\left(2^2\right)^8}=\frac{2^{30}}{2^{16}}=2^{14}=16384.\)
b) \(\frac{\left(0,2\right)^{10}}{\left(0,2\right)^5}=\left(0,2\right)^5=\frac{1}{3125}.\)
c) \(\frac{50^3}{125}=\frac{50^3}{5^3}=10^3=1000.\)
Chúc bạn học tốt!
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a) Ta có: \(\left(-2.5\cdot0.38\cdot0.4\right)-\left[0.125\cdot3.15\cdot\left(-8\right)\right]\)
\(=\left(-1\cdot0.38\right)-\left[-1\cdot3.15\right]\)
\(=-0.38+3.15\)
\(=\dfrac{277}{100}\)
b) Ta có: \(\left[\left(-20.83\right)\cdot0.2+\left(-9.17\right)\cdot0.2\right]:\left[2.47\cdot0.5-\left(-3.53\right)\cdot0.51\right]\)
\(=\dfrac{0.2\left(-20.83-9.17\right)}{3.0353}\)
\(=\dfrac{0.2\cdot\left(-30\right)}{3.0353}=\dfrac{-60000}{30353}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a: \(=\left\{\left[\left(6.2:0.31-0.9\right)\cdot0.2+0.15\right]\cdot5\right\}:\left(2+1\cdot2,2\right)\)
\(=\left\{\left[\left(20-0.9\right)\cdot0.2+0.15\right]\cdot5\right\}:4.2\)
\(=3.97\cdot5:4.2=\dfrac{397}{84}\)
b: Bạn ghi lại đề đi bạn
A = 1/625