Question

Calculați,după model: d)-1 pe 3 + 1 pe 27; h) -1,1(2)+4,0(2);i)-11 pe 18 +1,(2); j)5 pe 6 +(-0,25).

Answer 1

$d)~-\frac{1}{3}+\frac{1}{27}=$
$=-\frac{9}{27}+\frac{1}{27}=$
$=\frac{1}{27}-\frac{9}{27}=$
$=-\frac{8}{27}$
$h)~-1,1(2)+4,0(2)=$
$=4,0(2)-1,1(2)=2,9$
$i)~-\frac{11}{18}+1,(2)=$
$=1,(2)-\frac{11}{18}=$
$=\frac{22}{18}-\frac{11}{18}=\frac{11}{18}$
$j)~\frac{5}{6}+(-0,25)=$
$=\frac{5}{6}+\frac{1,5}{6}=\frac{3,5}{6}$