Question

calcule as expressões: a)$\frac{5}{2} . ( \frac{4}{3} - \frac{3}{4} )$


b) $\frac{1}{3} . ( \frac{3}{5} + \frac{1}{2} )$

Answer 1

a)

$\displaystyle \frac{5}{2}.(\frac{4}{3}-\frac{3}{4})\\\\\\ \frac{5}{2}.(\frac{16}{12}-\frac{9}{12})\\\\\\ \frac{5}{2}.(\frac{7}{12})\\\\\\ \frac{5}{2}.\frac{7}{12}\\\\\\ \bf \frac{35}{24}$


b)

$\displaystyle \frac{1}{3}.(\frac{3}{5}+\frac{1}{2})\\\\\\ \frac{1}{3}.(\frac{6}{10}+\frac{5}{10})\\\\\\ \frac{1}{3}.(\frac{11}{10})\\\\\\ \frac{1}{3}.\frac{11}{10}\\\\\\ \bf \frac{11}{30}$