Question

so sánh :

a) \(\frac{5}{6}....\frac{4}{5}\)

b) \(\frac{3}{5}....\frac{12}{20}\)

c) \(\frac{5}{12}....\frac{3}{4}\)

 

Answer 1

a) 5/6 > 4/5

b) 3/5 = 12/20

c) 5/12 < 3/4

Answer 2

a,>

b,=

c,<

Answer 3

a) =\(\frac{25}{30}>\frac{24}{30}\)( Quy đồng mẫu và tử ) suy ra \(\frac{5}{6}>\frac{4}{5}\)

b)=\(\frac{12}{20}=\frac{12}{20}\)tương tự

c)=\(\frac{5}{12}< \frac{9}{12}\)tương tự

Answer 4

a) \(\frac{5}{6}=1-\frac{1}{6};\frac{4}{5}=1-\frac{1}{5}\)

mà \(\frac{1}{6}< \frac{1}{5}\Rightarrow1-\frac{1}{6}>1-\frac{1}{5}\)

\(\Rightarrow\frac{5}{6}>\frac{4}{5}\)

b) \(\frac{3}{5}=\frac{12}{20}\)

c)\(\frac{3}{4}=\frac{9}{12}>\frac{5}{12}\)