Arrange the following in column form 4643 + 3287 + 1201 3465 + 4573 + 1687 5768 + 1648 + 2740 2467 + 3168 + 1230 6821 + 1249 + 2122

Ones column: $3 + 7 + 1 = 11$. Write down 1 and carry over 1 to the tens column.
Tens column: $4 + 8 + 5 + 1 (\text{carry-over}) = 18$. Write down 8 and carry over 1 to the hundreds column.
Hundreds column: $6 + 2 + 2 + 1 (\text{carry-over}) = 11$. Write down 1 and carry over 1 to the thousands column.
Thousands column: $4 + 3 + 1 + 1 (\text{carry-over}) = 9$. Write down 9.

$$\begin{array}{c} \phantom{0}\overset{1}{4}\overset{1}{6}\overset{1}{4}3 \\ \phantom{0}3287 \\ + \phantom{0}1251 \\ \hline \phantom{0}9181 \\ \end{array}$$

The sum is 9181.