\(\left(\frac{3}{10}+\frac{4}{5}\cdot\frac{1}{2}\right):\left(\frac{18}{9}-\frac{1}{\frac{1}{3}}\right)\)
\(=\frac{7}{10}:\left(-1\right)=\frac{-7}{10}\)
(3/10+4/5*1/2):(18/9-1/1/3)
=(3/10+4/10):(2-1/3)
=7/10:5/3=1/10.3/5
=21/50
lưu ý: 1/1/3=1:1:3=1/3 nha bn
\(\left(\frac{3}{10}+\frac{4}{5}\cdot\frac{1}{2}\right):\left(\frac{18}{9}-\frac{1}{\frac{1}{3}}\right)\)
\(=\left(\frac{3}{10}+\frac{4}{10}\right):\left(2-1:\frac{1}{3}\right)\)
\(=\frac{7}{10}:\left(2-3\right)\)
\(=\frac{7}{10}:\left(-1\right)=-\frac{7}{10}\)
mk giải luôn nhá:
\(\left(\frac{3}{10}+\frac{4}{5}\times\frac{1}{2}\right):\left(\frac{18}{9}-1\frac{1}{3}\right)\)
\(=\left(\frac{3}{10}+\frac{8}{10}\times\frac{5}{10}\right):\left(\frac{18}{9}-\frac{4}{3}\right)\)
=\(\left(\frac{3}{10}+\frac{40}{100}\right):\left(\frac{18}{9}-\frac{4}{3}\right)\)
=\(\frac{3}{10}+\frac{4}{10}:\left(\frac{18}{9}-\frac{4}{3}\right)\)
=\(\frac{7}{10}:\left(\frac{18}{9}-\frac{4}{3}\right)\)
\(=\frac{7}{10}:\left(\frac{64}{72}-\frac{36}{72}\right)\)
\(=\frac{7}{10}:\frac{28}{72}\)
\(=\frac{7}{10}\times\frac{72}{28}\)
\(=\frac{9}{5}\)
a) \(\left(\frac{3}{10}+\frac{4}{5}\times\frac{1}{2}\right):\left(\frac{18}{9}-\frac{1}{\frac{1}{3}}\right)\)
\(=\left(\frac{3}{10}+\frac{2}{5}\right):\left(2-3\right)\)
\(=\left(\frac{3}{10}+\frac{4}{10}\right):\left(-1\right)\)
\(=\frac{7}{10}:\left(-1\right)=-\frac{7}{10}\)
\(\left(\frac{3}{10}+\frac{1}{5}.\frac{1}{2}\right):\left(\frac{10}{9}-\frac{1}{3}\right)\)
\(=\left(\frac{3}{10}+\frac{2}{5}\right):\left(2-3\right)\)
\(=\left(\frac{3}{10}+\frac{4}{10}\right):\left(-1\right)\)
\(=\frac{7}{10}:\left(-1\right)\)
\(=-\frac{7}{10}\)
