1.3.2

# Subtraction

Test yourself

## Column Method Subtraction

The column method can help you add and subtract large numbers or numbers with decimals.

### What is 5562.8 - 1435.7?

• This is hard to work out in your head.

### 1) Subtract right hand column

• Make sure the decimal points of both numbers are lined up so you don't confuse place values.
• Start subtracting from the the right hand side.

### 2) Subtract 2nd column

• If we subtract 5 from 2 we will get a negative number.

### 3) Borrow a 1

• If this happens we 'borrow' a 1 from the next number to the left on the top line.
• Now we are calculating 12 - 5 = 7.

### 4) Subtract 3rd column

• Because we 'borrowed' from the 6 we now calculate 5 - 3 = 2.

### 5) Subtract 4th column

• Continue to work to the left subtracting one column at a time.

### 6) Subtract left hand column

• 5562.8 - 1435.7 = 4127.1

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