### The operation to perform:

52 - 37

#### Method used below: column subtracting, from right to left (traditional)

### Stack the numbers on top of each other.

#### The ones digits line up in the first column from the right.

#### The tens digits line up in the next column to the left.

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

### Subtract the digits in the ones column:

#### 2 - 7 = ?

#### The second digit is larger than the first.

Borrow from the next column to the left.

#### The borrowing is a two step process:

#### Subtract 1 from the top digit in the column of the tens: 5 - 1 = 4.

Cross out the top digit you've borrowed 1 from: ~~5~~.

Write the answer above that digit: 4.

#### When borrowing, 1 ten = 10 ones.

Add 10 to the top digit in the column of the ones: 10 + 2 = ^{1}2.

#### After borrowing the subtraction has become:

it2brw: 12 - 7 = 5.

5 is the ones digit.

Write it down at the base of the ones column.