Question

Tính :

0,(2) + 1,8(2)

Answer 1

May tinh VN nha tick con con tick lai

Answer 2

\(=2\frac{2}{45}\)

Answer 3

Ta  có: \(0,\left(2\right)=2.0,\left(1\right)=2.\frac{1}{9}=\frac{2}{9};\)

\(1,8\left(2\right)=1,8+0,0\left(2\right)=1,8+\frac{1}{10}.0,\left(2\right)=1,8+\frac{1}{10}.2.0,\left(1\right)=1,8+\frac{1}{10}.2.\frac{1}{9}=\frac{82}{45}\)

\(\Rightarrow0,\left(2\right)+1,8\left(2\right)=\frac{2}{9}+\frac{82}{45}=\frac{92}{45}\)

Answer 4

\(0,\left(2\right)+1,8\left(2\right)\)

=\(0,\left(1\right).2+1,8+0,0\left(2\right)\)

=\(\frac{1}{9}.2+1,8+0,0\left(1\right).2\)

=\(\frac{2}{9}+\frac{9}{5}+\frac{1}{90}.2\)

=\(\frac{20}{90}+\frac{162}{90}+\frac{2}{90}\)

=\(\frac{184}{90}\)

=\(\frac{92}{45}\)

Answer 5

\(2\frac{2}{45}\)