Subtracting In Columns

Let's subtract $62,783$ from the minuend, $71,057$. In the ones column, $7 - 3$ gives us . Moving to the tens, we cannot subtract $8$ from $5$, so we must borrow. However, the hundreds column is $0$ and has nothing to give, so we borrow from the thousands column, turning the top $1$ into a . This makes the hundreds column $10$, which we immediately borrow from to make our tens column $15$, leaving a in the hundreds column. Now for the tens column, $15 - 8$ leaves $7$. In the hundreds column, we calculate $9 - 7$ which leaves . Finally, for the thousands, we borrow from the ten thousands (turning $7$ into $6$), making the thousands column $10 - 2$ which gives $8$, resulting in a final difference of $8,274$.