Question

so xanh các phân số sau :

a) \(\dfrac{1234}{1235}\)và\(\dfrac{4319}{4320}\)              b) \(\dfrac{22}{-67}\)và\(\dfrac{51}{-152}\)

c) \(\dfrac{-18}{91}\)và\(\dfrac{-23}{114}\)

Answer 1

a) Ta có:

`1234/1235=1-1/1235` 

`4319/4320=1-1/4320`

Mà: `1/4320<1/1235=>1-1/4320>1-1/1235` 

`=>1234/1235<4319/4320` 

b) Ta có:

`22/67<22/66=1/3=>-22/67>-1/3`

`51/152>51/153=1/3=>-51/152<-1/3`

`=>-22/67>-51/152` 

c) Ta có:

`18/91<18/90=1/5=>-18/91>-1/5`

`23/114>23/115=1/5=>-23/114<-1/5`

`=>-18/91>-23/114`