Question

tính thuận tiện

14 :(4\(\frac{2}{3}\) - 1\(\frac{5}{9}\)) + 14 : (\(\frac{2}{3}\)+ \(\frac{8}{9}\))

Answer 1

\(=14:\left(\frac{14}{3}-\frac{14}{9}\right)+14:\left(\frac{2}{3}+\frac{8}{9}\right)\)

\(=14:\frac{28}{9}+14:\frac{14}{9}\)

\(=\frac{28}{9}+\frac{14}{9}\)

\(=\frac{42}{9}\)

Answer 2

\(14:\left(\frac{14}{3}-\frac{14}{9}\right)+14:\left(\frac{2}{3}+\frac{8}{9}\right)\)

\(=14:\left(\frac{42}{9}-\frac{14}{9}\right)+14:\left(\frac{6}{9}+\frac{8}{9}\right)\)

\(=14:\frac{28}{9}+14:\frac{14}{9}\)

\(=14.\frac{9}{28}+14.\frac{9}{14}\)

\(=14.\left(\frac{9}{28}+\frac{9}{14}\right)\)

\(=14.\left(\frac{9}{28}+\frac{18}{28}\right)\)

\(=14.\frac{27}{28}\)

\(=\frac{378}{28}\)

\(=\frac{27}{2}\)