=17/6:(1-2/3)
=17/6:1/3
=17/2
=13/6×9/2-6/7
=39/4-6/7
=249/28
a) \(\left(\frac{5}{2}+\frac{1}{3}\right):\left(1-\frac{2}{3}\right)=\left(\frac{15}{6}+\frac{2}{6}\right):\frac{1}{3}\)
\(=\frac{17}{6}:\frac{1}{3}=\frac{17}{6}\cdot\frac{3}{1}=\frac{17}{2}\cdot\frac{1}{1}=\frac{17}{2}\)
b) \(\left(\frac{5}{2}-\frac{1}{3}\right)\cdot\frac{9}{2}-\frac{6}{7}=\left(\frac{15}{6}-\frac{2}{6}\right)\cdot\frac{9}{2}-\frac{6}{7}\)
\(=\frac{13}{6}\cdot\frac{9}{2}-\frac{6}{7}=\frac{13}{2}\cdot\frac{3}{2}-\frac{6}{7}=\frac{39}{4}-\frac{6}{7}=\frac{273}{28}-\frac{24}{28}=\frac{249}{28}\)
a ) \(\left(\frac{5}{2}+\frac{1}{3}\right)\div\left(1-\frac{2}{3}\right)\)
\(=\left(\frac{15}{6}+\frac{2}{6}\right)\div\frac{1}{3}\)
\(=\frac{17}{6}\div\frac{1}{3}=\frac{17}{6}\cdot\frac{3}{1}\)
\(=\frac{17}{2}\)
b ) \(\left(\frac{5}{2}-\frac{1}{3}\right)\cdot\frac{9}{2}-\frac{6}{7}\)
\(=\left(\frac{15}{6}-\frac{2}{6}\right)\cdot\frac{9}{2}-\frac{6}{7}\)
\(=\frac{13}{6}\cdot\frac{51}{14}\)
\(=\frac{221}{28}\)
\(\left(\frac{5}{2}+\frac{1}{3}\right):\left(1-\frac{2}{3}\right)\)
\(=\frac{5}{3}:\frac{1}{3}\)
\(=5\)
\(\left(\frac{5}{2}-\frac{1}{3}\right)×\frac{9}{2}-\frac{6}{7}\)
\(=1×\frac{9}{2}-\frac{6}{7}\)
\(=\frac{51}{14}\)
a) (5/2 + 1/3) : (1 - 2/3)
= 5/3 : 1/3
= 15/3 = 5
b) (5/2 - 1/3) x 9/2 - 6/7
= 1 x 9/2 - 6/7
= 9/2 - 6/7
= 51/14
Hok tốt
\(\left(\frac{5}{2}+\frac{1}{3}\right):\left(1-\frac{2}{3}\right)\)
\(=\frac{17}{6}:\frac{1}{3}\)
\(=\frac{17}{2}\)
\(\left(\frac{5}{2}-\frac{1}{3}\right)\times\frac{9}{2}-\frac{6}{7}\)
\(=\frac{13}{6}\times\frac{9}{2}-\frac{6}{7}\)
\(=\frac{39}{4}-\frac{6}{7}\)
\(=\frac{239}{28}\)
