5.
$(-12,5)+17,55+(-3,5)-(-2,45)=(-12,5)+17,55+(-3,5)+2,45$
$=(17,55+2,45)-(12,5+3,5)=20-16=4$
6.
$4,35-(2,67-1,65)+(3,54-6,33)=4,35-2,67+1,65+3,54-6,33$
$=(4,35+1,65)+3,54-(2,67+6,33)$
$=6+3,54-9 = 3,54-(9-6)=3,54-3=0,54$
7.
$2,63.24,45+2,63.75,55$
$=2,63(24,45+75,55)=2,63.100=263$
9.
$1\frac{13}{15}.0,75-(\frac{8}{15}+25\text{%})$
$=\frac{28}{15}.\frac{3}{4}-(\frac{8}{15}+\frac{1}{4})$
$=\frac{7}{5}-\frac{8}{15}-\frac{1}{4}=\frac{13}{15}-\frac{1}{4}=\frac{37}{60}$
10.
$(\frac{4}{5}-1,2):\frac{2}{15}+(-2)^3.\frac{-1}{24}$
$=\frac{-2}{5}: \frac{2}{15}+(-8).\frac{-1}{24}$
$=(-3)+\frac{1}{3}=\frac{-8}{3}$
