🔢 Detailed Explanation of Addition and Subtraction Facts Up to 20
In Year 2, learning addition and subtraction facts up to 20 is very important because it helps us work with numbers quickly and confidently. Addition means putting numbers together to find the total, and subtraction means taking away numbers to find out what is left.
❓ What Are Addition and Subtraction Facts?
Addition and subtraction facts are simple number pairs and answers you should know by heart. For example:
- Addition fact: 7 + 5 = 12
- Subtraction fact: 15 – 8 = 7
These facts involve numbers up to 20 because the National Curriculum in the UK expects Year 2 children to use numbers from 0 to 20 fluently.
🎯 Strategies to Learn Addition and Subtraction Facts
- Counting On and Back
If you want to add 6 + 4, start at 6 and count on 4 steps: 7, 8, 9, 10.
For subtraction, like 14 – 5, start at 14 and count back 5 steps: 13, 12, 11, 10, 9. - Use Number Bonds
Number bonds are pairs of numbers that make a total.
For example, number bonds to 10 are 3 + 7, 6 + 4, or 5 + 5. Knowing these helps add and subtract easily. - Make Ten
When adding numbers like 8 + 7, first make 10 by adding 2 to 8, then add the leftover 5 to get 15. - Use a Number Line
You can use a number line from 0 to 20 to jump forward (addition) and backward (subtraction) to find answers.
📚 Examples
-
Addition Example:
12 + 7 = ?
Start at 12 on the number line, count on 7 steps: 13, 14, 15, 16, 17, 18, 19. The answer is 19. -
Subtraction Example:
18 – 9 = ?
Start at 18, count back 9 steps: 17, 16, 15, 14, 13, 12, 11, 10, 9. The answer is 9.
💡 Tips for Remembering Addition and Subtraction Facts
- Practice with flashcards or games to make learning fun.
- Write down number bonds to 20 and practice them every day.
- Use real-life objects like toys or fruit to count and calculate.
By learning addition and subtraction facts up to 20, you will find it easier to solve bigger problems and enjoy your maths lessons more!
📝 20 Examination-Style Questions with Answers on Addition and Subtraction Facts Up to 20
Here are 20 examination-style questions focusing on addition and subtraction facts up to 20 for Year 2 students in Key Stage 1. These questions help you practise your addition and subtraction skills and get ready for your tests. Each question also has a clear answer to help you learn and revise.
➕ Addition Questions
- What is 7 + 8?
Answer: 15 - Add 9 and 5. What do you get?
Answer: 14 - Find the sum of 12 and 6.
Answer: 18 - What is 4 + 11?
Answer: 15 - Add 10 and 9.
Answer: 19 - What do you get if you add 3 and 7?
Answer: 10 - Find the total of 6 + 8.
Answer: 14 - 5 + 5 equals what?
Answer: 10 - What is 14 plus 3?
Answer: 17 - Add 2 and 13 together.
Answer: 15
➖ Subtraction Questions
- What is 18 – 7?
Answer: 11 - Subtract 9 from 17. What is the answer?
Answer: 8 - Find the difference between 15 and 6.
Answer: 9 - 20 take away 14 equals what?
Answer: 6 - What is 11 – 4?
Answer: 7 - Subtract 3 from 13.
Answer: 10 - What is 16 minus 9?
Answer: 7 - Find the answer to 14 – 5.
Answer: 9 - 19 take away 10 equals?
Answer: 9 - What is 8 less than 20?
Answer: 12
Try to practise these addition and subtraction facts up to 20 often. It will help you get quicker and more confident with your maths!
