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Adding Numbers: Add two and three-digit numbers

In this worksheets, students add together a two-digit number and a three digit number using a formal column method.

'Adding Numbers: Add two and three-digit numbers' worksheet

Key stage:  KS 2

Curriculum topic:   Number: Addition and Subtraction

Curriculum subtopic:   Add/Subtract up to Four-Digit Numbers

Difficulty level:  

Worksheet Overview

In this activity, we'll look at how to add two and three digits numbers together.

 

 

For example: 

Question - Can you add the numbers below together?

 

+   6 9  
9 3 8  
 

 

So, how do we do this?

 

1) First, we add the 100 columns first - 900 + 0 = 900

2) Then, we add the 10 columns - 60 + 30 = 90

3) Next, we add the ones - 9 + 8 = 17

4) Finally, we add these together - 900 + 90 + 17 = 1007

 

Remember to put 0s as placeholders

Have a look below and you can see these steps written in number form.

 

+     6 9  
  9 3 8  
    9 0 0  
      9 0  
      1 7  
  1 0 0 7    



Ready to give this a go?

 

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