Question

So sánh các phân số:

\(\frac{21}{52}và\frac{213}{523}\)

Answer 1

phân số\(\frac{213}{523}\)>\(\frac{21}{52}\)

Answer 2

21/52=21x523/52x523=1092/27196

                          Vì 11076/27196>1092/27196 => 21/52<213/523

213/523=213x52/523x52=11076/27196

Answer 3

sử dụng phép quy đồng để so sánh phân số:

 \(\frac{21}{52}=\frac{213}{523}=\frac{21.523}{52.523}=\frac{11172}{27196}=\frac{2793}{6799}\)

  \(\frac{213}{523}=\frac{21}{52}=\frac{213.52}{523.52}=\frac{11076}{13075}\)Mẫu số ghi nhầm:27196

So sánh 11172 vs 11076 thì:11172>11076

Vậy 21/52>213/523

Answer 4

21/52>213/523

Answer 5

Ta có:

\(\frac{21}{52}=\frac{210}{520}=1-\frac{310}{520}\)

\(\frac{213}{523}=1-\frac{310}{523}\)

Mà \(\frac{310}{520}>\frac{310}{523}\)

\(\Rightarrow\frac{21}{52}< \frac{213}{523}\)