a) \(700=7\times100=7\times10^2=7\times\left(2\times5\right)^2=2^2\times5^2\times7\)
bn làm tg tự sẽ đc: \(9000=2^3\times3^2\times5^3\)
\(210000=2^4\times3\times5^4\times7\)
b) \(500=5\times10^2=5\times\left(2\times5\right)^2=2^2\times5^3\)
bn làm tương tự sẽ đc: \(1600=2^7\times5^2\)
\(18000=2^4\times3^2\times5^3\)