Question

Answer 1

DÀI NHỈ

Answer 2

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Answer 3

1.17:

\(=-\dfrac{6}{19}\cdot\left(\dfrac{1005}{2018}+\dfrac{1013}{2018}\right)+\dfrac{25}{19}=\dfrac{-6}{19}+\dfrac{25}{19}=1\)

1.18:

\(=\dfrac{-3}{7}\left(\dfrac{5}{11}+\dfrac{6}{11}\right)+\dfrac{9}{7}=\dfrac{-3}{7}+\dfrac{9}{7}=\dfrac{6}{7}\)

1.15:

\(=\dfrac{11}{4}\left(-\dfrac{5}{9}-\dfrac{4}{9}\right)\cdot\dfrac{8}{33}=\dfrac{-11}{4}\cdot\dfrac{8}{33}=-\dfrac{2}{3}\)