Question

[Nguyễn Quỳnh Anh]

70.\(\left(\dfrac{131313}{565656}+\dfrac{131313}{727272}+\dfrac{131313}{909090}\right)\)

Answer 1

[Quỳnh Anh Phạm]

B=70.$\left(\genfrac{}{}{0ex}{}{13.10101}{56.10101}+\genfrac{}{}{0ex}{}{13.10101}{72.10101}+\genfrac{}{}{0ex}{}{13.10101}{90.10101}\right)$

B=70.$\left(\genfrac{}{}{0ex}{}{13}{56}+\genfrac{}{}{0ex}{}{13}{72}+\genfrac{}{}{0ex}{}{13}{90}\right)$

B=70.$\genfrac{}{}{0ex}{}{39}{70}$=39

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