Question

[Vũ Khải Minh]

Answer 1

[HT.Phong (9A5)]

Bài 3:

\(a.-4,36\\ =\dfrac{-436}{100}\\ =\dfrac{-436:4}{100:4}\\ =\dfrac{-109}{25}\\b.0,708\\ =\dfrac{708}{1000}\\ =\dfrac{708:4}{1000:4}\\ =\dfrac{177}{250}\)

Answer 2

[Nguyễn Lê Phước Thịnh]

Bài 4: \(\dfrac{5}{12}=0,41\left(6\right)\)

\(-\dfrac{8}{11}=-0,\left(72\right)\)

\(\dfrac{3}{22}=0,1\left(36\right)\)

\(-\dfrac{111}{36}=-3,08\left(3\right)\)

Bài 5:

a: \(3,\left(15\right)=3+\dfrac{15}{99}=3+\dfrac{5}{33}=\dfrac{3\cdot33+5}{33}=\dfrac{104}{33}\)

b: \(0,2\left(07\right)=0,2+0,0\left(07\right)=\dfrac{41}{198}\)

c: \(0,1\left(37\right)=0,1+0,0\left(37\right)=\dfrac{1}{10}+\dfrac{37}{990}=\dfrac{68}{495}\)

d: \(0,20\left(23\right)=0,20+0,00\left(23\right)=0,2+\dfrac{23}{9900}=\dfrac{2003}{9900}\)