390500

390500

\(3124 . 125=390500\)

665412

665412

665412

3124 x 213 = 665 412

3124*213=665412

avuiadsadasdsdasdasasda osas

2k4

~the end~

a,79608

b,145375

c,665412

A) 79608

B) 145375

C) 721644

A) 248*321= 79 608

B) 1163*125= 145 375

  C) 3124*213=  665 412    

X= 0 ; y = 5

`@` `\text {Ans}`

`\downarrow`

`9^8 \div 3^2`

`= (3^2)^8 \div 3^2`

`= 3^16 \div 3^2`

`=`\(3^{16-2}=3^{14}\)

_____

`3^7 * 27^5 * 81^3`

`= 3^7*(3^3)^5 * (3^4)^3`

`= 3^7 * 3^15 * 3^12`

`=`\(3^{7+15+12}\)

`= 3^34`

______

`36^5 \div 18^5`

`= (36 \div 18)^5`

`= 2^5 = 32`

______

`24*5^5 + 5^2*5^3`

`= 24*5^5 + 5^5`

`= 5^5*(24+1)`

`= 5^5 * 25`

`= 5^5*5^2`

`= 5^7`

______

`125^4 \div 5^8`

`= (5^3)^4 \div 5^8`

`= 5^12 \div 5^8`

`= 5^4`

_____

`@` Phép nâng lên lũy thừa: \(\left(a^m\right)^n=a^{m\cdot n}\) 

`@` Chia lũy thừa cùng cơ số: \(a^m\div a^n=a^{m-n}\)

`@` Nhân lũy thừa cùng cơ số: \(a^m\cdot a^n=a^{m+n}\)

\(9^8:3^2\)

\(=\left(3^2\right)^8:3^2\)

\(=3^{16}:3^2\)

\(=3^{14}\)

=============

\(3^7\cdot27^5\cdot81^3\)

\(=3^7\cdot\left(3^3\right)^5\cdot\left(3^4\right)^3\)

\(=3^7\cdot3^{15}\cdot3^{12}\)

\(=3^{7+12+15}\)

\(=3^{34}\)

===============

\(36^5:18^5\)

\(=\left(36:18\right)^5\)

\(=2^5\)

\(=32\)

=============

\(24\cdot5^5+5^2\cdot5^3\)

\(=24\cdot5^5+5^5\)

\(=5^5\cdot\left(24+1\right)\)

\(=5^5\cdot25\)

\(=5^5\cdot5^2\)

\(=5^7\)

==============

\(125^4:5^8\)

\(=\left(5^3\right)^4:5^8\)

\(=5^{12}:5^8\)

\(=5^4\)