Question

viết các số sau ra phân số

0,(3);1,(32);1,3(2)

Answer 1

0,(3)= 0,(1).3 = \(\frac{1}{9}\) .3= \(\frac{3}{9}=\frac{1}{3}\) .

1,(32) = 1+0,(32) = 1+0,(01).32 = 1+ \(\frac{1}{99}\) .32 = 1+\(\frac{32}{99}\) = \(\frac{131}{99}\) .

1,3(2) = 1,3+0,0(2) = 1,3+\(\frac{1}{10}\) .0,(2)= 1,3+\(\frac{1}{10}\) .\(\frac{2}{9}\) =1,3+\(\frac{2}{90}\) = \(\frac{119}{90}\).

Answer 2

0,(3)= \(\frac{3}{10}\)

1,(32)=\(\frac{33}{25}\)

1,3(2)=\(\frac{33}{25}\)