Question

[le hoang]

C = 70 (\(\frac{131313}{565656}\)+\(\frac{131313}{727272}\)+\(\frac{131313}{909090}\))

      Tính C ?

               ................................................................... \(HELPME\)............................................................................

Answer 1

[DanAlex]

Ta có: \(\frac{131313}{565656}=\frac{131313:10101}{565656:10101}=\frac{13}{56}\)

\(\frac{131313}{727272}=\frac{13}{72}\)

\(\frac{131313}{909090}=\frac{13}{90}\)

\(\Rightarrow C=70\left(\frac{13}{56}+\frac{13}{72}+\frac{13}{90}\right)=70\left(\frac{39}{79}\right)=39\)

Vậy C = 39

Answer 2

[Hoàng Quỳnh Phương]

C=70(\(\frac{13}{56}+\frac{13}{72}+\frac{13}{90}\))=70\(\frac{39}{70}\)=39