Question

Questão 05) Resolva as expressões: a) (2/3)2 + (2/3) b) 4/5 x 3/8 c) 12 + 2/4 + 4/6 d) 8/9 - 3/2 e) 9/2 - 34​

Answer 1

$a)\\\left(2/3\right)\cdot \:2+\left(2/3\right)\\\\=\frac{2}{3}\cdot \:2+\left(2/3\right)\\\\=\frac{2}{3}\cdot \:2+\frac{2}{3}\\\\=\frac{4}{3}+\frac{2}{3}\\\\=2$     $b)\\\frac{4}{5}x\frac{3}{8}\\\\=\frac{x\cdot \:3}{5\cdot \:2}\\\\=\frac{x\cdot \:3}{10}\\\\\\=\frac{3x}{10}$          $c)\\12+2/4+4/6\\\\=12+\frac{2}{4}+4/6\\\\=12+\frac{2}{4}+\frac{4}{6}\\\\=\frac{79}{6}\\\\=13\frac{1}{6}$        $d)\\8/9-3/2\\\\=\frac{8}{9}-3/2\\\\=\frac{8}{9}-\frac{3}{2}\\\\=-\frac{11}{18}$

$e)\\9/2-34\\\\=\frac{9}{2}-34\\\\=-\frac{59}{2}$