Question

resolva as expressões: A) ( - 0,3) . 1/10 + 5,4 - 13/10= ; B) (5/8 + 5/4 + 5/2) . ( - 8/5)=

Answer 1

A)

$a=(-0.3)*( \frac{1}{10} )+5.4- \frac{13}{10}$
$a=-\frac{0.3}{10}+ \frac{54}{10} - \frac{13}{10}$
$a=\frac{40.7}{10}$
$a=4.07$

B)

$b=( \frac{5}{8} + \frac{5}{4} + \frac{5}{2} )*(- \frac{8}{5} )$
$b=( \frac{5}{8} + \frac{10}{8} + \frac{20}{8} )*(- \frac{8}{5} )$
$b=( \frac{35}{8})*(- \frac{8}{5} )$
$b=-5$