Key Stage 3Ages 11-14Maths

Free Addition Worksheets for Key Stage 3

Practice adding numbers. Download free printable maths worksheets designed for Key Stage 3 students (ages 11-14), aligned to the UK National Curriculum.

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What Your Child Will Learn

Understand key concepts in addition
Apply addition skills to solve problems
Build confidence with addition through practice
Develop fluency appropriate for Key Stage 3

Sample Addition Questions for Key Stage 3

Here are examples of the types of questions your child will practice:

1

Calculate: 12,456 + 8,795 + 3,421

easyshort answer
2

A company earned £45,670 in Q1 and £52,340 in Q2. Find the total earnings.

mediumshort answer
3

If x + 2,500 = 7,800, find x

mediumfill blank
4

Add these decimals: 45.67 + 123.89 + 7.5

hardshort answer
5

The sum of three consecutive numbers is 48. Find the numbers.

hardshort answer
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Skills Your Child Will Build

Mental calculation
Number sense
Problem solving
Place value understanding

Real-World Applications

Understanding addition helps children in everyday situations:

Shopping and counting change
Keeping score in games
Cooking measurements
Planning events

Common Mistakes to Watch For

Help your child avoid these common addition mistakes:

  • !Forgetting to carry
  • !Misaligning place values
  • !Not checking answers
  • !Counting errors

Learning Progression

Building these skills now prepares students for GCSE-level work, where addition understanding becomes essential for exam success.

Tips for Teaching Addition

1Start with concrete objects before moving to abstract numbers
2Use number lines to visualise adding
3Practice number bonds to build mental maths fluency
4Relate addition to real-life situations like shopping

More Maths Topics for Key Stage 3

SubtractionMultiplicationDivisionFractionsDecimalsPercentages

Addition for Other Age Groups

Early Years

Ages 0-2

Nursery

Ages 3-4

Reception

Ages 4-5

Key Stage 1

Ages 5-7

Key Stage 2

Ages 7-11

GCSE

Ages 14-16

A-Level

Ages 16-18

Frequently Asked Questions

What addition topics are covered in these worksheets?▼
Our addition worksheets for Key Stage 3 cover all aspects of practice adding numbers as required by the UK National Curriculum. Each worksheet is designed to build skills progressively from foundation to challenge level.
Are these addition worksheets suitable for Key Stage 3?▼
Yes, these worksheets are specifically designed for Key Stage 3 students (ages 11-14). The content difficulty and question types are carefully matched to National Curriculum expectations for this age group.
How can I use these addition worksheets effectively?▼
We recommend 15-20 minutes of focused practice per session. Use the worksheets to reinforce concepts taught at school, identify areas needing more practice, and build confidence. Every worksheet includes an answer key for easy self-assessment.
Do the addition worksheets include answer keys?▼
Yes, every worksheet comes with a complete answer key on a separate page. This makes it easy for parents to check homework, teachers to mark work, and students to self-assess their understanding.

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