5.
a)
[tex]\frac{33-3}{9} =\frac{30}{9}=\frac{10}{3}[/tex]
b)
[tex]\frac{5}{9}[/tex]
c)
[tex]\frac{18}{99}=\frac{2}{11}[/tex]
d)
[tex]\frac{209-2}{99}=\frac{207}{99}=\frac{23}{11}[/tex]
e)
[tex]\frac{1074-1}{999}=\frac{1073}{999}[/tex]
f)
[tex]\frac{476190}{999999} =\frac{52910}{111111}[/tex]
6.
a)
[tex]\frac{183-18}{90}= \frac{165}{90} =\frac{55}{30} =\frac{11}{6}[/tex]
b)
[tex]\frac{216-21}{90} =\frac{195}{90}=\frac{13}{6}[/tex]
c)
[tex]\frac{61-6}{90}=\frac{55}{90}=\frac{11}{18}[/tex]
d)
[tex]\frac{2083-208}{900} =\frac{1875}{900} =\frac{125}{60}=\frac{25}{12}[/tex]
f)
[tex]\frac{1136-11}{9900} =\frac{1125}{9900} =\frac{75}{660} =\frac{15}{132} =\frac{5}{44}[/tex]
7.
a) 2,25+3,(3)=5,58(3)
b) 5,4-4,1(6)=1,2(3)
[tex]\frac{54}{10} -\frac{416-41}{90}[/tex]
[tex]\frac{54}{10}-\frac{375}{90}=\frac{486-375}{90} =\frac{111}{90}=\frac{37}{30} =1,2(3)[/tex]
c) 5,(5)+4,(4)=9,(9)
d) 0,8(3)-0,(21)=0,62(12)
[tex]\frac{83-8}{90}-\frac{21}{99} =\frac{75}{90}-\frac{7}{33} =\frac{15}{18} -\frac{7}{33}= \frac{495-126}{594} =\frac{369}{594}=\frac{41}{66}=0,62(12)[/tex]
