Question

Giúp mink rồi mink tick cho nha!

So sánh

\(\frac{1999}{2000}\)và \(\frac{19992000}{20002000}\)

Answer 1

Ta có:

\(\frac{19992000}{20002000}=\frac{19991999+1}{20002000}=\frac{19991999}{20002000}+\frac{1}{20002000}\)

                                                        \(=\frac{1999}{2000}+\frac{1}{20002000}\)

Vì \(\frac{1999}{2000}< \frac{1999}{2000}+\frac{1}{20002000}\Rightarrow\frac{1999}{2000}< \frac{19992002}{20002000}\)

Answer 2

Ta có : \(\frac{19992000}{20002000}\)\(=\)\(\frac{19991999+1}{20002000}\)\(=\)\(\frac{19991999}{20002000}+\frac{1}{20002000}\)

                                                                  \(=\frac{1999}{2000}+\frac{1}{20002000}\)

Vì \(\frac{1999}{2000}< \frac{1999}{2000}+\frac{1}{20002000}=\frac{1999}{2000}< \frac{19992002}{20002000}\)