\(C=\frac{65+891+135+909}{731-47+69-253}\)
\(C=\frac{\left(65+135\right)+\left(891+909\right)}{\left(731+69\right)-\left(47+253\right)}\)
\(C=\frac{200+1800}{800-300}\)
\(C=\frac{2000}{500}=4\)
Ta có:
\(C=\frac{65+891+135+909}{731-47+69-253}\)
\(\Leftrightarrow C=\frac{\left(65+135\right)+\left(891+909\right)}{\left(731+69\right)-\left(47+253\right)}\)
\(\Leftrightarrow C=\frac{200+1800}{800-300}\)
\(\Leftrightarrow C=\frac{2000}{500}=4\)