Question

Tính 70\(\times\)(\(\frac{131313}{565656}+\frac{131313}{727272}+\frac{131313}{909090}\))

Answer 1

70x(13/56+13/72+13/90)

Answer 2

\(70\cdot\left(\frac{131313}{565656}+\frac{131313}{727272}+\frac{131313}{909090}\right)\)

\(=70\cdot\left(\frac{13}{56}+\frac{13}{72}+\frac{13}{90}\right)\)

\(=70\cdot\frac{39}{70}\)

\(=70\)

Answer 3

\(70\cdot\left(\frac{131313}{565656}+\frac{131313}{727272}+\frac{131313}{909090}\right)\)

\(=70\cdot\left(\frac{13}{56}+\frac{13}{72}+\frac{13}{90}\right)\)

\(=70\cdot\frac{39}{70}\)

\(=39\)