có bạn oi

VD: 30 chia hết cho 3, 6 chia hết cho 3 thì 

(30 + 6) chia hết cho 3 hay 

36 chia hết cho 3

\(\dfrac{\left(3^2\right)^2x2^{11}}{\left(2^4\right)^2x\left(2x3\right)^3}\) = \(\dfrac{3^4x2^{11}}{2^8x2^3x3^3}\) = \(\dfrac{3^4x2^{11}}{2^{11}x3^3}\) = \(\dfrac{3^1x1}{1x1}\) = \(\dfrac{3}{1}\) = 3