Question

B=-7/25.11/13+-7/25.2/13+2018 7/25

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Answer 1

Giải:

\(-\dfrac{7}{25}.\dfrac{11}{13}+\dfrac{-7}{25}.\dfrac{2}{13}+2018\dfrac{7}{25}\)

\(=-\dfrac{7}{25}.\dfrac{11}{13}+\dfrac{-7}{25}.\dfrac{2}{13}+2018+\dfrac{7}{25}\)

\(=-\dfrac{7}{25}.\left(\dfrac{11}{13}+\dfrac{2}{13}\right)+2018+\dfrac{7}{25}\)

\(=-\dfrac{7}{25}.1+2018+\dfrac{7}{25}\)

\(=-\dfrac{7}{25}+2018+\dfrac{7}{25}\)

\(=2018\)

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