a)
5,75+1 \frac{3}{5}=5,75+1,6=7,35
b)
3 \frac{1}{6}-1,4=\frac{19}{6}-\frac{14}{10}=\frac{19}{6}-\frac{7}{5}=\frac{95-42}{30}=\frac{53}{30}=1\frac{23}{30}
c)
1,04*3 \frac{1}{8}=1,04*3,125=3,25 na kalkulatorze
albo
1,04*3 \frac{1}{8}=\frac{104}{100}*\frac{25}{8}=\frac{13}{4}=3\frac{1}{4}
d)
2 \frac{1}{3}:3,2=\frac{7}{3}:\frac{32}{10}=\frac{7}{3}:\frac{16}{5}=\frac{7}{3}*\frac{5}{16}=\frac{35}{48}
http://www.wolframalpha.com/input/?i=\frac{7}{3}+%2F+\frac{32}{10}