0,(7)=0,(1).7=\(\dfrac{1}{9}\).7=\(\dfrac{7}{9}\)
0,(18)=0,(01).18=\(\dfrac{1}{99}.18=\dfrac{18}{99}\)
2,(125)=2+0,(001).125=\(2+\dfrac{1}{999}.125\)=2+\(\dfrac{125}{999}\)=\(\dfrac{2123}{999}\)
0,0(6)=0,(6):10=0,(1):10.6=\(\dfrac{1}{9}:10.6=\dfrac{1}{15}\)
1,1(2)=1+0,1(2)=1+0,(2):10+\(\dfrac{1}{10}\)=1+0,(1):10.2+\(\dfrac{1}{10}=1+\dfrac{1}{9}:10.2+\dfrac{1}{10}=\dfrac{101}{99}\)