3²x3³

=9x27

=243

=120 trang

quyển sách dày 

24 . 5 = 120 trang 

kik nha mk nhanh nhất

\(\frac{3}{4}+\frac{2}{7}+\frac{1}{4}+\frac{3}{5}+\frac{5}{7}\)

=\(\frac{3}{4}+\frac{1}{4}+\frac{2}{7}+\frac{5}{7}+\frac{3}{5}\)

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

=1+1 +\(\frac{3}{5}\)

= 2 + \(\frac{3}{5}\)

=\(\frac{13}{5}\)