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a: \(4^{10}\cdot2^{30}=2^{30}\cdot2^{20}=2^{50}\)
b: \(9^{25}\cdot27^4\cdot81^2=3^{50}\cdot3^{12}\cdot3^8=3^{70}\)
c: \(25^{50}\cdot125^5=5^{100}\cdot5^{15}=5^{115}\)
d: \(64^3\cdot4^8\cdot16^4=4^9\cdot4^8\cdot4^8=4^{25}\)
e: \(2^{10}:8^3=2^{10}:2^9=2\)
\(12^7:6^7=\left(\dfrac{12}{6}\right)^7=2^7\)
f: \(5^8:25^2=5^8:5^4=5^4\)
\(4^9:64^2=4^9:4^6=4^3\)
\(2^{25}:32^4=2^{25}:2^{20}=2^5\)
\(125^3:25^4=5^9:5^8=5\)
g: 2^5*8^4
=2^5*(2^3)^4
=2^5*2^12
=2^17
a) 8 3 . 2 4 = ( 2 3 ) 3 . 2 4 = 2 13
b) 2 5 . 4 3 . 16 2 = 2 5 . ( 2 2 ) 3 . ( 2 4 ) 2 = 2 19
c) 8 2 . 2 3 . 4 5 = ( 2 3 ) 2 . 2 3 . ( 2 2 ) 5 = 2 19
d) 3 5 . 3 2 . 9 3 = 3 5 . 3 2 . ( 3 2 ) 3 = 3 13
e) 3 4 . 27 3 . 81 2 = 3 4 . ( 3 3 ) 3 . ( 3 4 ) 2 = 3
f) 10 3 . 100 3 . 1000 = 10 3 . ( 10 2 ) 3 . 10 3 = 10 12
a) 8 3 . 2 4 = 2 3 3 . 2 4 = 2 13
b) 2 5 . 4 3 . 16 2 = 2 5 . 2 2 3 . 2 4 2 = 2 19
c) 8 2 . 2 3 . 4 5 = 2 3 2 . 2 3 . 2 2 5 = 2 19
d) 3 5 . 3 2 . 9 3 = 3 5 . 3 2 . 3 2 3 = 3 13
e) 3 4 . 27 3 . 81 2 = 3 4 . 3 3 3 . 3 4 2 = 3 21
f) 10 3 . 100 3 . 1000 = 10 3 . 10 2 3 . 10 3 = 10 12
a) 8 3 . 2 4 = ( 2 3 ) 3 . 2 4 = 2 13
b) 2 5 . 4 3 . 16 2 = 2 5 . ( 2 2 ) 3 . ( 2 4 ) 2 = 2 19
c) 8 2 . 2 3 . 4 5 = ( 2 3 ) 2 . 2 3 . ( 2 2 ) 5 = 2 19
d) 3 5 . 3 2 . 9 3 = 3 5 . 3 2 . ( 3 2 ) 3 = 3 13
e) 3 4 . 27 3 . 81 2 = 3 4 . ( 3 3 ) 3 . ( 3 4 ) 2 = 3 21
f) 10 3 . 100 3 . 1000 = 10 3 . ( 10 2 ) 2 . 10 3 = 10 12
a: \(3\cdot3\cdot3\cdot3\cdot3=3^5\)
b: \(y\cdot y\cdot y\cdot y=y^4\)
1.
a) \(3^4\times3^5\times3^6=3^{4+5+6}=3^{15}\)
b) \(5^2\times5^4\times5^5\times25=5^2\times5^4\times5^5\times5^2=5^{2+4+5+2}=5^{13}\)
c) \(10^8\div10^3=10^{8-3}=10^5\)
d) \(a^7\div a^2=a^{7-2}=a^5\)
2.
\(987=900+80+7\\ =9\times100+8\times10+7\\ =9\times10^2+8\times10^1+7\times10^0\)
\(2021=2000+20+1\\ =2\times1000+2\times10+1\times1\\ =2\times10^3+2\times10^1+1\times10^0\)
\(abcde=a\times10000+b\times1000+c\times100+d\times10+e\times1\\ =a\times10^4+b\times10^3+c\times10^2+d\times10^1+e\times10^0\)
a, 8 2 . 32 4 = 2 3 2 . 2 5 4 = 2 3 . 2 . 2 5 . 4 = 2 6 . 2 20 = 2 6 + 20 = 2 26
b, 27 4 . 9 3 . 243 = 3 3 4 . 3 2 3 . 3 5 = 3 3 . 4 . 3 2 . 3 . 3 5 = 3 12 . 3 6 . 3 5 = 3 12 + 6 + 5 = 3 23
c, 13 2 - 12 2 = 169 - 144 = 25 = 5 2
d, 6 2 + 8 2 = 36 + 64 = 100 = 10 2
e, 5 3 + 5 4 + 125 2 . 5 3 = 5 3 + 5 4 + 5 3 . 2 . 5 3 = 5 3 + 5 4 + 5 6 . 5 3 = 5 3 . 1 + 5 + 5 3 . 5 3 = 5 6 . 131
f, 1 3 + 2 3 + 3 3 + 4 3 + 5 3 = 1 + 8 + 27 + 64 + 125 = 225 = 15 2
a) \(2^5\cdot8^4\\ =2^5\cdot\left(2^3\right)^4\\ =2^5\cdot2^{12}\\ =2^{17}\)
b) \(25^6\cdot125^3\\ =\left(5^2\right)^6\cdot\left(5^3\right)^3\\ =5^{12}\cdot5^9\\ =5^{21}\)
c) \(625^3:25^7\\ =\left(5^4\right)^3:\left(5^2\right)^7\\ =5^{12}:5^{14}\\ =5^{-2}=\frac{1}{5^2}\)
d) \(4^{10}\cdot2^{30}\\ =\left(2^2\right)^{10}\cdot2^{30}\\ =2^{20}\cdot2^{30}\\= 2^{50}\)
e) \(9^{25}\cdot27^4\cdot81^3\\ =\left(3^2\right)^{25}\cdot\left(3^3\right)^4\cdot\left(3^4\right)^3\\ =3^{50}\cdot3^{12}\cdot3^{12}\\ =3^{74}\)