`1,2 = 12/10=6/5`
`3,25 =325/100=13/4`
`-5,123 = -5123/1000`
`0,(35)=35/99`
`1,(7)= 16/9`
`-2,(13)=-211/99`
`0,2(31)= 229/990`
`-2,3(45)= -129/55`
\(a,\\ 1,2=\dfrac{6}{5}\\ b,\\ 3,25=\dfrac{13}{4}\\ c,\\ -5,123=\dfrac{-5123}{1000}\\ d,\\ 0,\left(35\right)=\dfrac{35}{99}\\ e,\\ 1,\left(7\right)=\dfrac{16}{9}\\ f,\\ -2,\left(13\right)=-\dfrac{211}{99}\\ g,\\ 0,2\left(31\right)=\dfrac{229}{990}\\ h,\\ -2,3\left(45\right)=-\dfrac{129}{55}\)
Em không hiểu có thể hỏi lại nha
a, 1,2=\(\dfrac{6}{5}\)
b,3,25=\(\dfrac{13}{4}\)
c,-5,123=\(-\dfrac{5123}{1000}\)
d,0,(35)=\(\dfrac{35}{99}\)
e,1(7)=\(1+0,\left(7\right)=1+\dfrac{7}{9}=1\dfrac{7}{9}\)
f,-2,(13)=-[2+0,(13)]=-[2+\(\dfrac{13}{9}\) ]=-2\(\dfrac{13}{9}\)
g,0,2(31)=0,2+0,031=0,2 +\(\dfrac{31}{1000}\)=\(\dfrac{200}{1000}+\dfrac{31}{1000}=\dfrac{231}{1000}\)
h,-2,3(45)=-[2,3+0,045]=-[23/10 + 45/1000]=-[2300/1000 +45/1000]=-469/200
