Question

Rút gọn các phân số sau thành phân số tối giản:

\(\frac{18\times27+18\times\left(-23\right)}{34\times4-4\times52}\)

Answer 1

\(\frac{5^3.90.4^3}{25^2.3^2.2^{13}}=\frac{5^3.2.3^2.5.\left(2^2\right)^3}{\left(5^2\right)^2.3^2.2^{13}}=\frac{5^4.3^2.2^7}{5^4.3^2.2^{13}}=\frac{1}{2^4}=\frac{1}{16}\)

Answer 2

1/16                            

Answer 3

\(\frac{5^3.90.4^3}{25^3.3^2.2^{13}}=\frac{125.90.64}{15625.9.8192}=\frac{125.9.10.64}{125.125.9.64.128}=\frac{10}{125.128}=\frac{10}{16000}=\frac{1}{1600}\)