Addition & Subtraction to 20
Year 1Week 5
Year 1: Addition & Subtraction to 20 (Week 5)
5 daily worksheets — Part of Addition & Subtraction
Addition & Subtraction to 20
Year 1Week 5
Addition & Subtraction to 20
Year 1Week 5
Addition & Subtraction to 20
Year 1Week 5
Addition & Subtraction to 20
Year 1Week 5
About Year 1 Addition & Subtraction to 20 Worksheets
Can your child add AND subtract within 20? This final week of our Year 1 addition and subtraction worksheets brings both operations together. Mixing addition and subtraction helps your child recognise which operation to use — a skill that's essential for real maths confidence.
These five worksheets challenge your child to switch between adding and subtracting with numbers up to 20. By working through mixed problems, children develop the ability to read a question carefully, decide whether to add or subtract, and choose the best strategy. This is exactly what the national curriculum expects by the end of Year 1.
What's Inside Each Day
1
Day 1
Recognising addition and subtraction — your child practises identifying whether a problem requires adding or taking away.
2
Day 2
Fact families — children explore how addition and subtraction are related, for example 5 + 3 = 8, so 8 - 3 = 5.
3
Day 3
Missing number problems — your child works out the missing number in number sentences like _ + 4 = 9 and 12 - _ = 7.
4
Day 4
Mixed word problems — real-life stories require your child to decide whether to add or subtract, then solve the problem.
5
Day 5
End-of-topic challenge — a comprehensive worksheet covering all addition and subtraction skills within 20, perfect for assessing progress.
Skills Your Child Will Practise
- Choosing between addition and subtraction
- Understanding fact families
- Solving missing number problems
- Mixed addition and subtraction to 20
- Reading word problems carefully
- Checking answers and explaining reasoning
Top Tip for Parents
When your child reads a word problem, encourage them to look for key words: "altogether", "total", and "how many in all" usually mean addition, while "left", "fewer", and "how many more" suggest subtraction. Practising this at home with real scenarios will build their problem-solving confidence.
All our Year 1 Addition & Subtraction to 20 worksheets are completely free to download and print. Each worksheet is aligned to the UK national curriculum and includes fluency practice, word problems, and reasoning challenges — everything your child needs for a well-rounded KS1 maths practice session.