o: \(\dfrac{5}{20}+1\dfrac{7}{11}-25\%-\left(\dfrac{18}{11}-\dfrac{4}{9}\right)\)
\(=0,25-0,25+\dfrac{18}{11}-\dfrac{18}{11}+\dfrac{4}{9}\)
\(=0+0+\dfrac{4}{9}=\dfrac{4}{9}\)
q: \(\dfrac{4^6\cdot9^5+6^9\cdot120}{8^4\cdot3^{12}-6^{11}}\)
\(=\dfrac{2^{12}\cdot3^{10}+2^9\cdot3^9\cdot2^3\cdot3\cdot5}{2^{12}\cdot3^{12}-2^{11}\cdot3^{11}}\)
\(=\dfrac{2^{12}\cdot3^{10}+2^{12}\cdot3^{10}\cdot5}{2^{11}\cdot3^{11}\left(2\cdot3-1\right)}\)
\(=\dfrac{6\cdot2^{12}\cdot3^{10}}{2^{11}\cdot3^{11}\cdot5}=\dfrac{6\cdot2}{5\cdot3}=\dfrac{12}{15}=\dfrac{4}{5}\)
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