Question

So sánh hai phân số theo hai cách khác nhau:

A.3/4 và 4/3

B.11/8 và 7/10

Answer 1

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Answer 2

`C1` 

`3/4 < 1`

`4/3 > 1`

`=> 3/4 < 4/3`

`C2`

`3/4 = 9/12`

`4/3 = 16/12`

Mà : `9 < 16`

`=> 3/4 < 4/3`

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`C1`

`11/8 > 1`

`7/10 < 1`

`=> 11/8 > 7/10`

`C2`

`11/8 = 110/80`

`7/10 = 56/80`

Mà : `110 > 56`

`=> 11/8 > 7/10`

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`#BaoL i n h`

Answer 3

a)
C1: So sánh với 1:  
Ta có: 3/4 < 1
           4/3 > 1
=> 3/4 < 4/3

C2: Quy đồng:
Ta có: 3/4 = 9/12
          4/3 = 16/12
=> 3/4 < 4/3

b)
C1: So sánh với 1:
Ta có: 11/8 > 1
           7/10 < 1
=> 11/8 > 7/10

C2: Quy đồng:
Ta có: 11/8 = 110/80
           7/10 = 56/80
=> 11/8 > 7/10

Answer 4

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Answer 5

A. 

C1 : \(\dfrac{3}{4}< 1;\dfrac{4}{3}>1\)

\(\Rightarrow\dfrac{3}{4}< \dfrac{4}{3}\)

C2 : \(\dfrac{3}{4}=\dfrac{9}{12};\dfrac{4}{3}=\dfrac{16}{12}\)

\(\Rightarrow\dfrac{9}{12}< \dfrac{16}{12}\Rightarrow\dfrac{3}{4}< \dfrac{4}{3}\)

B. 

C1 : \(\dfrac{11}{8}>1;\dfrac{7}{10}< 1\Rightarrow\dfrac{11}{8}>\dfrac{7}{10}\)

C2 : \(\dfrac{11}{8}=\dfrac{110}{80};\dfrac{7}{10}=\dfrac{56}{80}\)

\(\Rightarrow\dfrac{110}{80}>\dfrac{56}{80}\Rightarrow\dfrac{11}{8}>\dfrac{7}{10}\)