Ta có ; \(\frac{-7}{25}.\frac{11}{13}+\frac{-7}{25}.\frac{2}{13}-\frac{18}{25}\)
\(=\frac{-7}{25}.\left(\frac{11}{13}+\frac{2}{13}\right)-\frac{18}{25}\)
\(=\frac{-7}{25}.1-\frac{18}{25}\)
\(=\frac{-7}{25}-\frac{18}{25}=\frac{-25}{25}=-1\)
mk ko ghi lại đầu bài nhé
=-7/25.(11/13+2/13)-18/25
=-7/25.1-18/25
=-7/25-18/25
=-25/25
=-1
~ chúc bạn học toots~ k mk nha
Thanks mina-san nhiều ~!♥ Arigatou gozaimatsu~
\(-\frac{7}{25}.\frac{11}{13}+\frac{-7}{25}.\frac{2}{13}-\frac{18}{25}\)
\(=-\frac{7}{25}.\left(\frac{11}{13}+\frac{2}{13}\right)-\frac{18}{25}\)
\(=-\frac{7}{25}.\frac{13}{13}-\frac{18}{25}\)
\(=-\frac{7}{25}.1-\frac{18}{25}\)
\(=-\frac{7}{25}-\frac{18}{25}\)
\(=\frac{\left(-7\right)-18}{25}\)
\(=\frac{\left(-7\right)+\left(-18\right)}{25}\)
\(=-\frac{25}{25}\)
\(=\left(-25\right):25\)
\(=-1\)
