Add two 3 or 4-digit numbers together

Learning focus

Learn how to add a three or four-digit number to another three or four-digit number.

This includes:

  • one video

  • two slideshows

  • two activity sheets

Learn

First, let's recap on the basic method for column addition with this video from KS2 Maths.

Checklist

  • When writing down sums, separate the numbers into ones, tens, hundreds and thousands.
  • List the numbers in a column and always start adding with the ones first.

  • Estimate first and check afterwards - it's a good idea to estimate a rough answer first 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.

Column addition

The column method involves writing one number underneath the other.

What is 343 + 315?

Start from the ones column: 3 + 5 = 8

Start from the ones column: 3 + 5 = 8

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If the two numbers in a place value column add up to a number greater than 9, you must carry a digit.

What is 343 + 329?

Start from the ones column: 3 + 9 = 12, place a 2 in the ones column and carry 10 to the tens column by placing a 1

Start from the ones column: 3 + 9 = 12, place a 2 in the ones column and carry 10 to the tens column by placing a 1 below

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Can you work out how this method might be used to add two 4-digit numbers together? Why not think of two 4-digit numbers and give it a go?

Practise

Activity 1

Can you complete the questions in this worksheet from Collins? If you don't have a printer, you could write the answers down in a workbook.

Addition worksheet

Activity 2

You could also try this worksheet from Twinkl.

Addition worksheet

Check here for the answer sheet

Play

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

Guardians: Defenders of Mathematica

There's more to learn

Have a look at these other resources.

More Year 5 and P6 lessons
Primary Catch-Up Lessons
KS2 Maths
Primary games