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Adding Numbers: Add Two 3-Digit Numbers

In this worksheet, students add together two numbers - both of which have three digits. They use a formal written/column method.

'Adding Numbers: Add Two 3-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 worksheet we learn how to use our knowledge of place value to add three-digit numbers

For example -

Question - Add the numbers together.

+ 1 5 8  
9 6 1  
 

Answer -

 

First, add the hundreds  100 + 900 = 1000

Next, add the tens  50 + 60 = 110

Then, add the ones  8 + 1 = 9

Finally, add 1000, 110 and 9 

 

+   1 5 8  
  9 6 1  
  1 0 0 0  
    1 1 0  
        9  
  1 1 1 9    

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