Question

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Answer 1

a: 8/10=4/5>3/5

b: 12/16=3/4

28/21=4/3

=>3/4<1<4/3

Answer 2

Có :

`8/10 = 4/5`

`3/5`

Mà : `4 > 3`

`=> 4/5 > 3/5`

Vậy `8/10 > 3/5`

_________________________

Có :

`12/16 = 3/4`

`28/21 = 4/3`

Mà : `3/4 < 4/4 => 3/4 < 1`

`4/3 > 3/3 => 4/3 > 1`

`=> 3/4 < 4/3`

Vậy `12/16 < 28/21`

Answer 3

 

Cách 1:

a,\(\dfrac{8}{10}\) giữ nguyên \(\dfrac{3}{5}=\dfrac{6}{10}\)

Vậy: \(\dfrac{8}{10}>\dfrac{6}{10}\)

Cách 2:

\(\dfrac{8}{10}=\dfrac{4}{5}\)

\(\dfrac{3}{5}\) giữ nguyên

Vậy:

\(\dfrac{4}{5}>\dfrac{3}{5}\)

b,

\(\dfrac{12}{16}=\dfrac{3}{4}\)

\(\dfrac{28}{21}=\dfrac{4}{3}\)

\(\dfrac{3}{4}< 1< \dfrac{4}{3}\)

Vậy:\(\dfrac{12}{16}< \dfrac{28}{21}\)