How to subtract integer numbers: calculate the difference and learn to subtract multiple digits numbers, column subtracting method, from right to left

Let's learn by an example. Subtract the numbers: 2,043 - 1,959

Stack the numbers on top of each other.

And so on...

 2 0 4 3 - 1 9 5 9 ?

Subtract column by column; start from the column on the right

Subtract the digits in the ones column:

When borrowing, 1 ten = 10 ones. Add 10 to the top digit in the column of the ones: 10 + 3 = 13.

 3 2 0 4 13 - 1 9 5 9

After borrowing, the subtraction has become: 13 - 9 = 4. 4 is the ones digit. Write it down at the base of the ones column.

 3 2 0 4 13 - 1 9 5 9 4

Subtract the digits in the tens column:

When borrowing, 1 hundred = 10 tens. Add 10 to the top digit in the column of the tens: 10 + 3 = 13.

 1 9 13 2 0 4 13 - 1 9 5 9 4

After borrowing, the subtraction has become: 13 - 5 = 8. 8 is the tens digit. Write it down at the base of the tens column.

 1 9 13 2 0 4 13 - 1 9 5 9 8 4

Subtract the digits in the hundreds column:

09 - 9 = 0. 0 is the hundreds digit. Write it down at the base of the hundreds column.

 1 9 13 2 0 4 13 - 1 9 5 9 0 8 4

Subtract the digits in the thousands column:

21 - 1 = 0. 0 is the thousands digit. Write it down at the base of the thousands column.

 1 9 13 2 0 4 13 - 1 9 5 9 0 0 8 4