-1/3 < -1/4; -1/27 ; 3/456789 <4/5

( CÓ THỂ VIẾT vô số số)

\(\frac{1}{5};\frac{2}{5};\frac{3}{5}\)

ok nha banj

mẫu phải # nhau bạn

6/15, 14/30, 24/45

\(\dfrac{7}{15};\dfrac{14}{30};\dfrac{28}{60}\)

TSC : 4

\(\dfrac{1}{3}=\dfrac{4}{12};\dfrac{4}{5}\)

\(\dfrac{4}{12}< \dfrac{4}{11}< \dfrac{4}{10}< \dfrac{4}{9}< \dfrac{4}{8}< \dfrac{4}{7}< \dfrac{4}{6}< \dfrac{4}{5}\)

\(\Rightarrow\) 3 phân số đó là : \(\dfrac{4}{9};\dfrac{4}{8};\dfrac{4}{7}\)

\(\dfrac{-1}{4};\dfrac{1}{2};\dfrac{6}{10}\)

Ta lần lượt có :

\(\text{−}\dfrac{1}{3}< \text{−}\dfrac{1}{4}\Rightarrow\text{−}\dfrac{1}{3}< \text{−}\dfrac{2}{7}< \text{−}\dfrac{1}{4}\)

\(\text{−}\dfrac{1}{3}< \text{−}\dfrac{2}{7}\Rightarrow\text{−}\dfrac{1}{3}< \text{−}\dfrac{3}{10}< \text{−}\dfrac{2}{7}\)

\(\text{−}\dfrac{1}{3}< \text{−}\dfrac{3}{10}\Rightarrow\text{−}\dfrac{1}{3}< \text{−}\dfrac{4}{13}< \text{−}\dfrac{3}{10}\)

Vậy \(\text{−}\dfrac{1}{3}< \text{−}\dfrac{4}{10}< \text{−}\dfrac{3}{10}< \text{−}\dfrac{2}{7}< \text{−}\dfrac{1}{4}\)

\(\frac{-103}{209}\)

\(\frac{-1}{3}\)

\(\frac{-6}{7}\)

a: -1/6; 0/2; 2/5

b: Gọi mẫu là x

Theo đề, ta có: \(\dfrac{-9}{11}< \dfrac{7}{x}< \dfrac{-9}{13}\)

\(\Leftrightarrow\dfrac{-63}{77}< \dfrac{-63}{-9x}< \dfrac{-63}{91}\)

\(\Leftrightarrow\dfrac{63}{77}>\dfrac{63}{-9x}>\dfrac{63}{91}\)

=>77<-9x<91

\(\Leftrightarrow-9x\in\left\{81;90\right\}\)

hay \(x\in\left\{-9;-10\right\}\)