A= \(\frac{19}{23}\)

\(\frac{19}{23}\)

\(\frac{8}{3}\cdot\frac{2}{5}\cdot\frac{3}{8}\cdot10\cdot\frac{19}{92}=\left(\frac{8}{3}\cdot\frac{3}{8}\right)\cdot\left(\frac{2}{5}\cdot10\right)\cdot\frac{19}{92}=1\cdot4\cdot\frac{19}{92}=4\cdot\frac{19}{92}=\frac{19}{23}\)

\(\frac{8}{3}.\frac{2}{5}.\frac{3}{8}.10.\frac{19}{92}\)

\(=(\frac{8}{3}.\frac{3}{8}).(\frac{2}{5}.10).\frac{19}{92}\)

\(=4.\frac{19}{92}\)

\(=\frac{19}{23}\)

Hok tôt !!!!!!!!!!!!!!!

\(\frac{8}{3}\times\frac{2}{5}\times\frac{3}{8}\times10\times\frac{19}{92}=\frac{8\times2\times3\times10\times19}{3\times5\times8\times92}=\frac{2\times19}{46}=\frac{2\times19}{2\times23}=\frac{19}{23}\)

làm ơn chọn mk để mk lên 700 điểm hỏi đáp với

=8/3.2/5.3/8.10.19/92

=16/15.3/8.10.19/92

=2/5.10.19/92

=19/23

a) 5 . 3 ² - 3 . 2 ³

= 3 ( 5 . 3 - 2 ³ )

=  3 . ( 15 - 8 )

= 3 . 7

= 21

b) 86 + ( - 335 ) + 114 + ( - 65 )

= 86 + 114 + ( - 335 ) + ( - 65 )

= 200 + ( - 400 )

= - 200

A= \(\frac{-4}{5}+\frac{4}{3}-\frac{5}{4}+\frac{14}{5}-\frac{7}{3}\)

=\(2-1-\frac{5}{4}\)

=\(\frac{-1}{4}\)

\(\frac{8.2.3.19}{3.5.8.10.92}=\frac{19}{2300}\)