Question

- So sánh các phân số sau ( Kh quy đồng mẫu hoặc tử)

a) \(\frac{1234}{1235}va\frac{4319}{4320}\)

b)\(\frac{-1234}{1244}va\frac{-4321}{4331}\)

 

Answer 1

a) \(\frac{1}{1235}>\frac{1}{4320}\Rightarrow-\frac{1}{1235}< -\frac{1}{4320}\Rightarrow1-\frac{1}{1235}< 1-\frac{1}{4320}\Rightarrow\frac{1234}{1235}< \frac{4319}{4320}.\)

b) \(\frac{10}{1244}< \frac{10}{4331}\Rightarrow\frac{10}{1244}-1< \frac{10}{4331}-1\Rightarrow-\frac{1234}{1244}< -\frac{4321}{4331}\)

Answer 2

a)  Ta có:

1234/1235 = 1 - 1/1235

4319/4320 = 1 - 1/4320

Vì 1/1235 > 1/4320

=> 1234/1235 < 4319/4320

b) -1234/1244 = -1 + 10/1244

-4321/4331 = -1 + 10/4331

Vì 10/1244 > 10/4331

=> -1 + 10/4331 > -1/4331

Ủng hộ mk nha ♡_♡