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Scrieti sub forma de fractii ordinare ireductibile

a) 1,2;0,75;4,12 b) 0,(3); 2,36; 4,125 c) 0,3(12); 8,0(6); 12,12(345)


Răspuns :

a) 1,2=12/10=6/5;
0,75=3/4;
4,12=412/100=103/25;
b)0,(3)=3/9=1/3;
2,36=236/100=59/25;
4,125=4125/1000=33/8;
c)0,3(12)=(312-3)/990=309/990=
103/330;
8,0(6)=(806-8)/90=798/90=133/15;
12,12(345)=(1212345-1212)/99900=
1211133/99900=403711/33300
1,2=[tex] \frac{12}{10} [/tex]
0,75=[tex] \frac{75}{100} [/tex]
4,12=[tex] \frac{412}{100} [/tex]
0,(5)=[tex] \frac{5}{9} [/tex]
2,36=[tex] \frac{236}{100} [/tex]
4,125=[tex] \frac{4125}{1000} [/tex]
0,3(12)=[tex] \frac{309}{990} [/tex]
8,0(6)=[tex] \frac{799}{900} [/tex]
12,12(345)=[tex] \frac{1211133}{99900} [/tex]