# Subtract up to 4-digit numbers

## Learning focus

Learn how to subtract up to two four-digit numbers.

This lesson includes:

a catch-up quiz

one video

three slideshows

# Quiz

To get started, let's see how well you know this topic already. Take the catch-up quiz below to find out.

# Learn

Numbers can be subtracted using the column method.

Watch this video to learn about subtracting 4-digit numbers using the column method.

Numbers can be subtracted using the column method.

Let's have a look at using this method to subtract one 3-digit number from another.

## Example 1

## Example 2:

## Example 2

**What is 343 - 237?**

When using a place value column to subtract two large numbers, sometimes the second number will be larger than the first. This means it cannot be directly subtracted. You need to exchange a digit from the next column.

This example shows how it works:

## Example 3:

If you can subtract two three-digit numbers from each other, then you can use the same method to subtract two four-digit numbers!

You use the exact same method no matter how many digits are in the numbers.

Take a look at this example:

## Checklist

- Use the column method to help subtract large numbers.
- Separate the numbers into their place value of
**ones, tens, hundreds and thousands.** - Start on the right with the ones column first.
- Estimate your answer first and then always check your actual answer.
- Subtraction is the opposite to addition, so subtraction can be checked by adding. For example, check that 182 - 37 = 145 by doing the sum 145 + 37 = 182
- Look out for these words in problems: take away, difference, less than, minus, decrease, fewer than, reduce. They all indicate subtraction.

# Play

Play **Guardians: Defenders of Mathematica** to learn more and sharpen your skills on this topic.