265 x 236 + 265 x 265 - 265

= 265 ( 236 + 265 - 1 )

= 265 x 500

= 132 500

\(\dfrac{2\text{x}}{3}=\dfrac{x}{\dfrac{3}{2}}\)

\(\Leftrightarrow\dfrac{2\text{x}}{3}=\dfrac{x}{3}:\dfrac{1}{2}\)

\(\Leftrightarrow\dfrac{2\text{x}}{3}=\dfrac{x}{3}\times2\)

\(\Leftrightarrow\dfrac{2\text{x}}{3}=\dfrac{2\text{x}}{3}\)

\(-\dfrac{3}{7}\times\dfrac{15}{13}-\dfrac{3}{7}\times\dfrac{11}{13}-\dfrac{3}{7}\)

\(=-\dfrac{3}{7}\left(\dfrac{15}{13}+\dfrac{11}{13}+1\right)\)

\(=-\dfrac{3}{7}\left(\dfrac{15}{13}+\dfrac{11}{13}+\dfrac{13}{13}\right)\)

\(=-\dfrac{3}{7}\times\dfrac{39}{13}=-\dfrac{3}{7}\times3=-\dfrac{9}{7}\)

\(\dfrac{2}{7}+-\dfrac{3}{8}+\dfrac{11}{7}+\dfrac{1}{3}+\dfrac{1}{7}+\dfrac{5}{-8}\)

\(=\left(\dfrac{2}{7}+\dfrac{11}{7}+\dfrac{1}{7}\right)+\left(-\dfrac{3}{8}-\dfrac{5}{8}\right)+\dfrac{1}{3}\)

\(=\dfrac{14}{7}+\left(-\dfrac{8}{8}\right)+\dfrac{1}{3}=2-1+\dfrac{1}{3}\)

\(=\dfrac{6}{3}-\dfrac{3}{3}+\dfrac{1}{3}=\dfrac{4}{3}\)

\(\dfrac{1}{5}\times\dfrac{4}{7}+\dfrac{3}{7}\times\dfrac{1}{5}-\dfrac{1}{5}=\dfrac{1}{5}\times\left(\dfrac{4}{7}+\dfrac{3}{7}-1\right)=\dfrac{1}{5}\times0=0\)

\(\dfrac{8}{9}+\dfrac{10}{99}=\dfrac{88}{99}+\dfrac{10}{99}=\dfrac{98}{99}\)

\(\dfrac{3}{2}+\dfrac{3}{2}=\dfrac{3+3}{2}=\dfrac{6}{2}=3\)

Drinking enough water can keep your body and brain tresh.

nước tiểu chính thức khác nước tiểu đầu ở chỗ : cái ion cần thiết và lượng nước ít hơn, và ko có chất dinh dưỡng

\(\dfrac{143}{44}=\dfrac{143:11}{44:11}=\dfrac{3}{4}\)