ở giữa lak dấu nhân ak??????

=-1/2 nha bn!!!!!!

2 câu mà bạn

Giải giùm mk với @@@@

14 x 47=658

14.47=14.47

14.47=658

dung khong ban????????

14 . 47 = 658

13.75 + 23.13 - 120

= 13.(75 + 23) - 120

= 13.98 - 120

= 1274 - 120

= 1154 

\(\frac{2}{3}+\left(\frac{5}{14}+\frac{-25}{23}\right)-\left(\frac{-2}{23}-\frac{9}{14}\right)\) \(=\frac{2}{3}+\frac{5}{14}+\frac{-25}{23}+\frac{2}{23}+\frac{9}{14}\) \(=\frac{2}{3}+\left(\frac{5}{14}+\frac{9}{14}\right)+\left(\frac{-25}{23}+\frac{2}{23}\right)\) \(=\frac{2}{3}+1-1\) =\(\frac{2}{3}\)

1) \(\frac{2}{3}+\left(\frac{5}{14}+\frac{-25}{23}\right)-\left(\frac{-2}{23}-\frac{9}{14}\right)\)

= \(\frac{2}{3}+\frac{5}{14}+\frac{-25}{23}-\frac{-2}{23}+\frac{9}{14}\)

= \(\frac{-25}{23}+\frac{2}{23}+\left(\frac{5}{14}+\frac{9}{14}\right)+\frac{2}{3}\)

= \(-\frac{23}{23}+\frac{14}{14}+\frac{2}{3}\)

= \(-1+1+\frac{2}{3}\)

= 0 + \(\frac{2}{3}\)

= \(\frac{2}{3}\)

\(9\frac{8}{23}-\left(5\frac{7}{12}+14\frac{8}{23}\right)\)

\(< =>\frac{215}{23}-\left(\frac{67}{12}+\frac{330}{23}\right)\)

\(< =>\frac{215}{23}-\frac{5501}{276}\)

\(< =>\frac{-127}{12}\)

chuc ban hoc tot nhe >.<

\(=9\frac{8}{23}-14\frac{8}{23}-5\frac{7}{12}\)

\(=-5-5\frac{7}{12}=-5-\frac{67}{12}\)

\(=\frac{-60-67}{12}=\frac{-127}{12}\)

\(A=\frac{1135}{23}-\left(\frac{167}{32}+\frac{330}{23}\right)=\frac{1135}{23}-\frac{330}{23}+\frac{167}{32}=35+\frac{167}{32}=\frac{1287}{32}\)