Question

Answer 1

Bài 2: 

a) \(\dfrac{-5}{3}=-1,666666...=-1,\left(6\right)\)

b) \(\dfrac{5}{9}=0,55555....=0,\left(5\right)\)

c) \(\dfrac{4}{11}=0,36363636....=0,\left(36\right)\)

d) \(\dfrac{12}{45}=\dfrac{4}{15}=0,266666...=0,2\left(6\right)\)

e) \(-\dfrac{2}{3}=-0,666666...=-0,\left(6\right)\)

g) \(\dfrac{4}{7}=0,571428571428...=0,\left(571428\right)\)

h) \(-1\dfrac{3}{11}=-\dfrac{14}{11}=-1,27272727...=-1,\left(27\right)\)

i) \(-1\dfrac{19}{132}=-\dfrac{151}{132}=-1,14393939...=-1,14\left(39\right)\)

Answer 2

Bài 3:

a) \(-2,15=\dfrac{-215}{100}=-\dfrac{43}{20}\)

b) \(4,28=\dfrac{428}{100}=\dfrac{107}{25}\)

c) \(-0,48=\dfrac{-48}{100}=-\dfrac{12}{25}\)

d) \(-0,425=\dfrac{-425}{1000}=-\dfrac{17}{40}\)

Answer 3

Bài 4:

a) \(0,\left(3\right)=\dfrac{1}{3}\)

b) \(0,\left(31\right)=\dfrac{31}{99}\)

c) \(5,\left(45\right)=\dfrac{60}{11}\)

d) \(-2,\left(412\right)=-\dfrac{2410}{999}\)

e) \(0,\left(4\right)=\dfrac{4}{9}\)

f) \(0,\left(15\right)=\dfrac{5}{33}\)

g) \(-1,\left(12\right)=-\dfrac{37}{33}\)