Question

So sánh phân số

\(\dfrac{267}{-268}\)và \(\dfrac{-1347}{1343}\)

Answer 1

So sánh :

\(\dfrac{-267}{268}\) và \(\dfrac{-1347}{1343}\)

BCNN ( 268 ; 1343 ) = 268 . 1343 = 359924

\(\Rightarrow\) Mẫu chung = 359924

\(\dfrac{-267}{359924}\) . 1343 = \(\dfrac{-358581}{359924}\)

\(\dfrac{-1347}{359924}\) . 268 = \(\dfrac{-360996}{359924}\)

\(\dfrac{-358581}{359924}\) > \(\dfrac{-360996}{359924}\) \(\Leftrightarrow\) \(\dfrac{-267}{268}\) > \(\dfrac{-1347}{1343}\)

Answer 2

Ta có: \(\dfrac{267}{-268}=\dfrac{-267}{268}\)

Ta thấy: \(\dfrac{-267}{268}>-1\)

\(\dfrac{-1347}{1343}< -1\)

\(\Rightarrow\dfrac{-1347}{1343}< -1< \dfrac{-267}{268}\)

Vậy \(\dfrac{-267}{268}>\dfrac{-1347}{1343}\)

Answer 3

Ta có:

\(\dfrac{267}{268}< 1\) và \(\dfrac{1347}{1343}>1\)

nên \(\dfrac{267}{268}< \dfrac{1347}{1343}\)

Suy ra \(\dfrac{267}{-268}>\dfrac{-1347}{1343}\)

Answer 4

\(\dfrac{267}{-268}\) > \(\dfrac{-1347}{1343}\)