Lining Up The Columns

When adding numbers of different lengths, we must arrange them correctly before we begin. Let us add $68,293$, $439$, and $30,292$. We line up all three numbers from the right so that ones are under ones. For the number $439$, the $9$ goes in the column, the $3$ goes in the tens column, and the $4$ goes in the hundreds column. Because $439$ has no thousands or ten thousands, those places on the left side are left or filled with a zero. Starting from the right-hand side, we add column by column. We must remember to include any carry overs in our totals. After carefully adding all columns, our final sum is .