Question

Viết thành phân số :

a / 1,(7)

b/ 0, (45)

c/ 0,0 (31)

d/ 1,8 (33)

Answer 1

\(a\text{)}1,\left(7\right)=1+0,\left(7\right)=1+\frac{7}{9}=\frac{16}{9}\)

\(b\text{)}0,\left(45\right)=\frac{45}{99}\)

\(c\text{)}0,0\left(31\right)=0,\left(31\right):10=\frac{31}{99}:10=\frac{31}{990}\)

\(d\text{)}1,8\left(33\right)=1,8+0,0\left(33\right)=1,8+0,\left(33\right):10=1,8+\frac{33}{990}=\frac{54}{30}+\frac{1}{30}=\frac{55}{30}\)

Answer 2

Bn ghi sai đề thì phải làm gì có ngoặc