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các tại hạ cíu tui zớiiiiiiiiiiiiiiiiiiiiiiiii tui sắp phải đi thỉnh kinh òiiii

các tại hạ cíu tui zớiiiiiiiiiiiiiiiiiiiii sắp phải đi thỉnh kinh òi huhuhuhuhu

a) \(\dfrac{7}{11}=1-\dfrac{4}{11}=1-\dfrac{8}{22}\)

    \(\dfrac{17}{23}=1-\dfrac{6}{23}\)

Vì \(\dfrac{8}{22}\) > \(\dfrac{6}{23}\) ⇒\(\dfrac{7}{11}>\dfrac{17}{23}\)

b) \(\dfrac{12}{48}\) = \(\dfrac{1}{4}\) = \(\dfrac{13}{52}\) < \(\dfrac{13}{27}\) 

Vì \(\dfrac{13}{52}< \dfrac{13}{27}\) ⇒ \(\dfrac{12}{48}< \dfrac{13}{27}\)  

a) Có 143/363 = 13/33
=> 13/33 = 143/363
b)Có 12/27 = 4/9
         1212/2727 = 4/9
=> 12/27 = 1212/2727 

a) Ta có:   \(\dfrac{13}{33}=\dfrac{143}{363}\) 

     Mà \(\dfrac{143}{363}=\dfrac{143}{363}\)

     Vậy \(\dfrac{13}{33}=\dfrac{143}{363}\)

b) Ta có: \(\dfrac{12}{27}=\dfrac{1212}{2727}\)

     Mà \(\dfrac{1212}{2727}=\dfrac{1212}{2727}\)

     Vậy \(\dfrac{12}{27}=\dfrac{1212}{2727}\)

a) Ta có : 

\(\dfrac{13}{33}=\dfrac{13.11}{33.11}=\dfrac{143}{363}\) 

\(\Rightarrow\dfrac{13}{33}=\dfrac{143}{363}\) ( điều phải chứng minh ) 

Vậy ...... 

b) Ta có : 

\(\dfrac{1212}{2727}=\dfrac{1212:101}{2727:101}=\dfrac{12}{27}\) 

\(\Rightarrow\dfrac{1212}{2727}=\dfrac{12}{27}\) ( điều phải chứng minh ) 

Vậy ...... 

Chúc bạn học tốt 

 \(\dfrac{143}{363}\) = \(\dfrac{143:11}{363:11}\) = \(\dfrac{13}{33}\) (đpcm)

\(\dfrac{1212}{2727}\) = \(\dfrac{1212:101}{2727:101}\) = \(\dfrac{12}{27}\) (đpcm)

\(\dfrac{13}{33}\)  và \(\dfrac{143}{363}\)

\(\dfrac{13}{33}=\dfrac{13\times11}{33\times11}=\dfrac{143}{363}\)

\(\dfrac{143}{363}=\dfrac{143\times1}{363\times1}=\dfrac{143}{363}\)

\(\dfrac{1212}{2727}\)  và \(\dfrac{12}{27}\)

\(\dfrac{12}{27}=\dfrac{12\times101}{27\times101}=\dfrac{1212}{2727}\)

\(\dfrac{1212}{2727}=\dfrac{1212\times1}{2727\times1}=\dfrac{1212}{2727}\)

đó là toán mà

a) \(\dfrac{12}{14}=\dfrac{1200}{1400}=\dfrac{1400-200}{1400}=1-\dfrac{200}{1400}\)

\(\dfrac{1212}{1414}=\dfrac{1414-200}{1414}=1-\dfrac{200}{1414}\)

vì \(\dfrac{200}{1414}< \dfrac{200}{1400}\)

Nên \(1-\dfrac{200}{1400}< 1-\dfrac{200}{1414}\)

Vậy \(\dfrac{12}{14}< \dfrac{1212}{1414}\)

Các bài sau tương tự

\(\frac{23}{3}>\frac{15}{2}\)

\(\frac{14}{7}>\frac{2}{9}\)

\(\frac{12}{13}< \frac{13}{14}\)

\(\frac{17}{16}< \frac{16}{15}\)

\(\frac{8}{6}>\frac{42}{43}\)