# Add numbers with up to 4 digits together

## Learning focus

Learn how to add numbers with up to 4 digits together.

This 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

Let's recap the basic method for column addition with this video from KS2 Maths.

## Column addition

The column method involves writing one number underneath the other.

Add the numbers, starting from the right.

## Example 1 Start from the ones column: 3 + 5 = 8.1 of 4 In the tens column: 40 + 10 = 50.2 of 4 In the hundreds column: 300 + 300 = 600.3 of 4 The finished sum. 343 + 315 = 658.4 of 4

## Example 2

If the two numbers in a place value column add up to a number greater than 9, you must carry a digit. Start from the ones column: 3 + 9 = 12. Write a 2 in the ones column and carry 10 to the tens column by writing a 1 below.1 of 4 In the tens column: 40 + 20 + 10 = 70. Remember to add that extra ten you carried over.2 of 4 In the hundreds column: 300 + 300 = 600.3 of 4 The finished sum. 343 + 329 = 672.4 of 4

If you can add two 3-digit numbers, then you can use the exact same method to add 4-digit numbers together!

Just remember to add on the number that you carry over.

## What is 4214 + 3936? As always, start by adding the ones column. 4 + 6 = 10. Place a 0 in the ones column and carry 10 over to the tens column.1 of 5 Add up all the digits in the tens column. Don’t forget about the 10 that was carried over!2 of 5 Move on to the hundreds column. 200 + 900 = 1100. Put the 1 in the hundreds column and carry the 1 in the thousands over.3 of 5 Add up all the thousands to find the answer! 4000 + 3000 + 1000 = 8000.4 of 5 4214 + 3936 = 8150.5 of 5

## Checklist

• When writing down sums, separate the numbers into ones, tens, hundreds and thousands.
• List the numbers in a column and always start adding the ones first.
• Estimate first and check afterwards - it's a good idea to estimate a rough answer and then check your actual answer.
• Order doesn't matter - for example, remember that 345 + 129 is the same as 129 + 345.
• Key words - look out for these words in problems: total, sum, altogether, more. They all indicate an addition calculation.

# Play

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

# There's more to learn

Have a look at these other resources.