Subtract 54,636 from 80,004: Vertical Format Solution

To solve this subtraction problem, we will perform vertical subtraction, paying close attention to borrowing across zeros:

Step-by-step solution:

• Write the numbers such that they align vertically, with the larger number on top and the smaller number directly below each corresponding digit:

$\begin{aligned} &80004 \\ -&54636 \\ &\overline{\phantom{77600}} & \\ \end{aligned}$

• Start subtracting from the rightmost digit:

• 1. Units place: $4 - 6$. Since 4 is less than 6, borrow 1 from the tens place (next digit).
  2. Tens place: Now, treat it as $10 - 3$, but since you borrowed 1 for the units place, it becomes $9 - 3 = 6$.
  3. Hundreds place: Borrow from the thousands place since you need a digit to make $0 - 6$. It becomes $10 - 6 = 4$.
  4. Thousands place: Now subtract from what remains after borrowing from it, $9 - 4$, which equals 5.
  5. Ten-thousands place: Since you borrowed to the right, $7 - 5 = 2$ in this position.

• The subtraction yields the result as follows:

$\begin{aligned} &9560 14 \\ -&\phantom{0}54636 \\ &\phantom{0}\underline{25368} & \\ \end{aligned}$

Therefore, the solution to the subtraction problem is $\mathbf{25368}$.