Cách 1 :
Ta có : \(1-\frac{4}{11}=\frac{7}{11};1-\frac{8}{15}=\frac{7}{15}\)
Vì \(\frac{7}{11}>\frac{7}{15}\)nên \(\frac{4}{11}< \frac{8}{15}\).
Cách 2 :
Vì \(\frac{4}{11}< \frac{4}{8}=\frac{1}{2};\frac{1}{2}=\frac{8}{16}< \frac{8}{15}\)nên \(\frac{4}{11}< \frac{8}{15}\).
~ HOK TỐT ~
Cách 1:
\(1-\frac{4}{11}=\frac{7}{11}\)
\(1-\frac{8}{15}=\frac{7}{15}\)
Vì \(\frac{7}{11}>\frac{7}{15}\Rightarrow\frac{4}{11}< \frac{8}{15}\)
Cách 2:
\(\frac{4}{11}=\frac{60}{165}\)
\(\frac{8}{15}=\frac{88}{165}\)
Vì \(\frac{60}{165}< \frac{88}{165}\)
\(\Rightarrow\frac{4}{11}< \frac{8}{15}\)
Cách 3:
Ta có:
\(\frac{4}{11}=\frac{8}{22}< \frac{8}{15}\)
\(\Rightarrow\frac{4}{11}< \frac{8}{15}\)
Cách 4:
\(\frac{4}{11}-1=\frac{-7}{11}\)
\(\frac{8}{15}-1=\frac{-7}{15}\)
Vì \(\frac{-7}{11}< \frac{-7}{15}\)\(\Rightarrow\frac{4}{11}< \frac{8}{15}\)
