Add and Subtract Within 20

Welcome to our Add and Subtract within 20 worksheets.

Master you addition and subtraction skills using one of our worksheets. Take your pick from a wide range of traditional worksheets, adding and subtracting grids, codebreakers and online quizzes.

Our sheets are carefully graded, with the easiest ones coming first in each section.

Learning to Add and Subtract within 20

When learning to add and subtract numbers within 20, it seems a straightforward task.

We just need to be able to work out facts like 19 - 14 or 12 + 6.

Most math worksheets will focus on this skill which is certainly a necessary one.

However, as well as learning the basic facts, there are also many more skills to learn.

Here are some of the skills and learning involved:

  • learning basic addition and subtraction facts up to 20, e.g. 7 + 11, 18 - 13
  • able to work out missing number facts, e.g. 7 + __ = 13, __ - 6 = 12
  • able to work out facts when the 'answer' comes first, e.g. 18 = __ + 7, 4 = 19 - __
  • able to understand and solve addition and subtraction word problems

Our worksheets cover all these skills and more!

Add and Subtract within 20 Worksheets

We have split our worksheets into sections based on type.

  • The first section contains traditional worksheets and missing number facts for addition and subtraction up to 20.
  • The second section contains addition and subtraction grids with numbers up to 20.
  • The third section contains codebreakers where you have to work out the message using your addition and subtraction skills.
  • The fourth section contains addition and subtraction word problems.
  • We also have an addition and subtraction online quiz with numbers up to 20.

The sheets involve different skills to solve and have been set out in different ways to give more variety and interest.

The sheets are graded so that the easier ones are at the top.

Want to test yourself to see how well you have understood this skill?.

  • Try our NEW quick quiz at the bottom of this page.

Add and Subtract Within 20 Worksheets

Each of these sheets has a set of 24 or 30 questions and also a challenge.

The challenges get slightly harder as you progress through the sheets.

Here is a quick breakdown of the content of the sheets, with the easier sheets coming first:

  • Sheets 1 & 2 have a number track to support the addition and subtraction and 24 questions.
  • Sheet 3 is similar to sheet 1 but with no number track and 30 questions.
  • Sheets 4 and 5 have three different numbers to add or subtract,
    e.g. 15 − 7 + 5, 4 + 14 − 8
  • Sheet 6 is similar to sheet 3, but also has missing number questions.
  • Sheets 7 and 8 are similar to sheet 4 but also include changes the order of the equation, e.g. 5 = 18 - 13.

Add and Subtract Within 20 Grids

These worksheets involve adding and subtracting numbers in grids.

You have to add/subtract at the number at the top of each column to/from the number at the side of the grid in each row to find the result.

  • Sheets 1 and 2 have straightforward grids with a complete set of numbers at the top and left of the grid
  • Sheets 3 and 4 have some missing numbers on the top and left which can be found by using the numbers inside the grid and working backwards.
  • Sheet 5 has 4 mini grids to solve with missing numbers.

Addition and Subtraction Codebreakers

Looking for a fun addition and subtraction worksheet to help you learn your facts?

Try one of our codebreakers - you have to find out the answer to the joke by cracking the code.

Each letter is made by working out the addition and subtraction fact.

We have two Halloween codebreakers and two more general ones.

Addition and Subtraction Within 20 Word Problems

We have some word problem worksheets to help you to apply your addition and subtraction facts.

Each sheet contains 12 mixed addition and subtraction problems.

Both sheets are at a similar level of difficulty.

Other 2nd Grade Addition and Subtraction Puzzles

Most of these puzzles involve addition only, often with more than 2 numbers.

More Recommended Math Worksheets

Take a look at some more of our worksheets similar to these.

Addition Fact Worksheets up to 20

These worksheets involve addition up to 20 only, with no subtraction.

Subtraction Fact Worksheets up to 20

These worksheets involve subtraction up to 20 only.

Addition and Subtraction Fact Worksheet Generator

Here is our random worksheet generator for free addition and subtraction fact worksheets.

Using this generator will let you create worksheets about:

  • Adding with a choice of number values;
  • Working out addition problems where the total is given, but one of the addends is missing.

More Addition and Subtraction Worksheets

Here you will find a range of Free Printable Second Grade Addition Worksheets.

The following worksheets involve using the Second Grade Math skills of adding numbers, and solving addition problems.

Using these sheets will help your child to:

  • learn to add numbers to 1000 in columns.

Second Grade Math Puzzles

The puzzles will help your child practice and apply their addition, subtraction and multiplication facts as well as developing their thinking and reasoning skills in a fun and engaging way.

The Number Square Puzzles page will open a new browser window which will take you to the 2nd grade math salamanders website.

Using these puzzles will help your child to:

  • learn their addition facts to 20+20;
  • learn and practice subtraction facts to 20;
  • pratice multiplying up to 5x5;
  • develop thinking and reasoning skills;
  • develop perseverance.

Add and Subtract Within 20 Online Quiz

Our quizzes have been created using Google Forms.

At the end of the quiz, you will get the chance to see your results by clicking 'See Score'.

This will take you to a new webpage where your results will be shown. You can print a copy of your results from this page, either as a pdf or as a paper copy.

For incorrect responses, we have added some helpful learning points to explain which answer was correct and why.

We do not collect any personal data from our quizzes, except in the 'First Name' and 'Group/Class' fields which are both optional and only used for teachers to identify students within their educational setting.

We also collect the results from the quizzes which we use to help us to develop our resources and give us insight into future resources to create.

For more information on the information we collect, please take a look at our Privacy Policy

We would be grateful for any feedback on our quizzes, please let us know using our Contact Us link, or use the Facebook Comments form at the bottom of the page.

This quick quiz tests your knowledge of addition facts to 20.


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The Math Salamanders hope you enjoy using these free printable Math worksheets and all our other Math games and resources.

We welcome any comments about our site or worksheets on the Facebook comments box at the bottom of every page.

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