\(\dfrac{15\cdot50}{25\cdot3\cdot20}\\ =\dfrac{15\cdot50}{5^2\cdot3\cdot2\cdot10}\\ =\dfrac{15\cdot50}{\left(5\cdot10\right)\cdot\left(5\cdot3\right)\cdot2}=\dfrac{15\cdot50}{50\cdot15\cdot2}=\dfrac{1}{2}\)
\(\dfrac{15.50}{25.3.20}\)= \(\dfrac{5.2}{1.1.20}\)= \(\dfrac{1.2}{1.4}\)=\(\dfrac{1.1}{1.2}=\dfrac{1}{2}\)
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\(\dfrac{15.50}{25.3.20}=\dfrac{3.5.5.10}{5.5.3.4.5}=\dfrac{10}{4.5}=\dfrac{10}{20}\)
➩\(\dfrac{15.50}{25.3.20}\) Rút gọn thành \(\dfrac{10}{20}\)
