Question

So sánh :-219/220 và  -215/216

 

Answer 1

\(-\frac{219}{220}< -\frac{215}{216}\)

Answer 2

Ta có:

\(1-\frac{-219}{220}=1\frac{219}{220}=1+\frac{219}{220}\)

\(1-\frac{-215}{216}=1\frac{215}{216}=1+\frac{215}{216}\)

Ta so sánh hai phân số \(\frac{219}{220};\frac{215}{216}\)

Ta có:

1-219/220=1/220

1-215/216=1/216

Vì 220>216 => 1/220 < 1/216 => 219/220 > 215/216 => 1+219/220 > 1+215/220 => \(-\frac{219}{220}>\frac{-215}{216}\)

Vậy \(-\frac{219}{220}>\frac{-215}{216}\)