Solve the following equation.

\(3.2\text{ cm}+18.6\text{ mm}=\underline{\hspace{1cm}}\text{ mm}\)

(A)  \(2.18\)

(B)  \(5.06\)

(C)  \(21.8\)

(D)  \(50.6\)

Calculate \(15\dfrac{2}{5}\text{ m}+2.8\text{ m}+94\text{ cm}\).

State the answer in the unit of \(\text{m}\).

(A)  \(112.05\text{ m}\)

(B)  \(19.14\text{ m}\)

(C)  \(112.05\text{ cm}\)

(D)  \(19.14\text{ cm}\)

\(2\text{ km }500\text{ m}+5\,049\text{ m}+2.1\text{ km}\)

\(=\underline{\hspace{1cm}}\text{km}\)

(A)  \(9.649\)

(B)  \(96.49\)

(C)  \(964.9\)

(D)  \(9\,649\)

Sum up \(4\text{ km }76\text{ m}\), \(21.4\text{ km}\) and \(36\dfrac{3}{5}\text{ km}\).

State the answer in metre.

(A)  \(25.476\)

(B)  \(62.076\)

(C)  \(58\,076\)

(D)  \(62\,076\)

Find the value of \(18.75\text{ km}-3\dfrac{1}{5}\text{ km}-9\text{ km}\).

(A)  \(6.55\text{ km}\)

(B)  \(9.75\text{ km}\)

(C)  \(5.8\text{ km}\)

(D)  \(15.55\text{ km}\)