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a) \(\dfrac{2}{5}=\dfrac{4}{10}\)
\(\dfrac{4}{10}>\dfrac{3}{10}\)
b) \(\dfrac{5}{6}=\dfrac{10}{12}\)
\(\dfrac{7}{12}< \dfrac{10}{12}\)
c) \(\dfrac{1}{2}=\dfrac{2}{4}\)
\(\dfrac{3}{4}< \dfrac{2}{4}\)
d) \(\dfrac{8}{3}=\dfrac{56}{21}\)
\(\dfrac{56}{21}>\dfrac{11}{21}\)
a) \(\dfrac{3}{4}=\dfrac{3\times4}{4\times4}=\dfrac{12}{16}\)
b) \(\dfrac{1}{3}=\dfrac{1\times3}{3\times3}=\dfrac{3}{9}\)
c) \(\dfrac{5}{6}=\dfrac{5\times3}{6\times3}=\dfrac{15}{18}\)
\(\dfrac{1}{3}< \dfrac{3}{5}< \dfrac{7}{9}< \dfrac{9}{11}< \dfrac{11}{13}\)
a) Theo thứ tự từ bé đến lớn: \(\dfrac{6}{20}\) , \(\dfrac{12}{32}\) , \(\dfrac{9}{12}\)
b) Theo thứ tự từ lớn đến bé: \(\dfrac{5}{6},\dfrac{3}{4},\dfrac{2}{3}\)
a) Thứ tự từ bé đến lớn: \(\dfrac{2}{7};\dfrac{3}{7};\dfrac{5}{7}\)
b) Thứ tự từ bé đến lớn: \(\dfrac{1}{8};\dfrac{5}{8};\dfrac{7}{8}\)
c) Thứ tự từ bé đến lớn: \(\dfrac{1}{10};\dfrac{7}{10};\dfrac{9}{10}\)
\(\dfrac{4}{5};\dfrac{5}{6};\dfrac{7}{6};\dfrac{5}{4}\)
a)
\(\dfrac{5}{6}< \dfrac{7}{6}\)
\(2=\dfrac{6}{3}\)
\(\dfrac{3}{7}>\dfrac{4}{14}\) (vì \(\dfrac{4}{14}=\dfrac{2}{7}\))
\(\dfrac{12}{20}< \dfrac{4}{5}\) (vì \(\dfrac{12}{20}=\dfrac{3}{5}\))
b)
\(\dfrac{1}{13}=\dfrac{3}{39};\dfrac{25}{13}=\dfrac{75}{39}\)
\(\dfrac{75}{39}>\dfrac{4}{39}>\dfrac{3}{39}\rightarrow\dfrac{75}{39},\dfrac{4}{39},\dfrac{3}{39}\)
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\(\dfrac{2}{8}=\dfrac{4}{16};\dfrac{7}{4}=\dfrac{28}{16}\)
\(\dfrac{28}{16}>\dfrac{9}{16}>\dfrac{4}{16}\rightarrow\dfrac{28}{16},\dfrac{9}{16},\dfrac{4}{16}\)
a)
\(\dfrac{5}{9}< \dfrac{9}{9}\)
\(\dfrac{8}{7}>\dfrac{7}{7}\)
\(\dfrac{9}{9}=1\)
\(\dfrac{18}{4}>\dfrac{3}{4}\)
b)
\(\dfrac{2}{5},\dfrac{3}{5},\dfrac{8}{5}\)
\(\dfrac{5}{2}=\dfrac{15}{6},\dfrac{1}{6},1=\dfrac{6}{6}\rightarrow\dfrac{1}{6},\dfrac{6}{6},\dfrac{15}{6}\)