\(\dfrac{1}{3}=\dfrac{1\times10}{3\times10}=\dfrac{10}{30};\dfrac{2}{5}=\dfrac{2\times6}{5\times6}=\dfrac{12}{30};\dfrac{1}{2}=\dfrac{1\times15}{2\times15}=\dfrac{15}{30}\)
Bạn Hoa ăn nhiều hơn và bạn An ăn ít hơn
\(\dfrac{1}{3}=\dfrac{1x10}{3x10}=\dfrac{10}{30}\)
\(\dfrac{2}{5}=\dfrac{2.6}{5.6}=\dfrac{12}{30}\)
\(\dfrac{1}{2}=\dfrac{1.15}{2.15}=\dfrac{15}{30}\)
Tacos\(\dfrac{10}{30}< \dfrac{12}{30}< \dfrac{15}{30}hay\dfrac{1}{3}< \dfrac{2}{5}< \dfrac{1}{2}\)
=> Hoa ăn nhiều nhất
An ăn ít nhất
Ta có: \(\left\{{}\begin{matrix}\dfrac{1}{3}=\dfrac{1\times10}{3\times10}=\dfrac{10}{30}\\\dfrac{2}{5}=\dfrac{2\times6}{5\times6}=\dfrac{12}{30}\\\dfrac{1}{2}=\dfrac{1\times15}{2\times15}=\dfrac{15}{30}\end{matrix}\right.\)
Vì \(\dfrac{10}{30}< \dfrac{12}{30}< \dfrac{15}{30}\Rightarrow\dfrac{1}{3}< \dfrac{2}{5}< \dfrac{1}{2}\)
Vậy Hoa ăn nhiều bánh nhất, An ăn ít bánh nhất.
