Grade 1 · Year 2 · Class 1 · ages 6–7 · Addition
Addition within 20: Grade 1 practice
Adding numbers with totals up to 20, including bridging through 10. Eight questions at a time, instant feedback and a mastery score from 0 to 100.
This practice needs JavaScript. You can still print a addition within 20 worksheet with an answer key.
Right answers raise your mastery score (more on harder questions) and wrong ones lower it a little. Your best score is saved on this device, and in your account if you log in.
The idea in one minute
To add 8 + 5, make 10 first (8 + 2) and then add the 3 that is left.
Try these on paper first
One question at each level. Tap a question to see the answer.
Easy 3 + 4 =
Answer: 7
Medium 19 + 1 =
Answer: 20
Challenge 8 + 6 =
Answer: 14
More ways to practise addition within 20
- Printable addition within 20 worksheet with an answer key (new questions every time)
- Bubble Pop Maths: Pop the bubble with the right answer. 60 seconds, streaks and bonus points.
- Maths Meteors: Sums fall from space. Type the answers to blast them before they land.
- All Grade 1 practice · Addition worksheets
Related skills
- Addition within 10 (Grade 1)
- Number bonds and missing numbers (Grade 1)
- Adding within 20 word problems (Grade 1)
- 2-digit addition (Grade 2)
Take a break
Play a game that builds the same skills
FAQ
Addition within 20: questions
What grade is addition within 20?
It is usually taught in Grade 1 (Year 2 in England, Class 1 in India, ages 6–7), though schools and countries differ. Try the grade above or below if it feels too hard or too easy.
What does a addition within 20 question look like?
For example: "19 + 1 =" The answer is 20. To add 8 + 5, make 10 first (8 + 2) and then add the 3 that is left.
What should I learn before and after addition within 20?
Before it, try addition within 10 (Grade 1). After it, move on to number bonds and missing numbers (Grade 1).
How can I get better at addition within 20?
To add 8 + 5, make 10 first (8 + 2) and then add the 3 that is left. Practise a little every day, read the hint after each wrong answer, and use the printable worksheet when you want to write it out.
Start a conversation
Need help with addition within 20?
A parent or guardian can tell us the grade and what feels hard, and we will suggest a starting point.
- Tell us the learner’s age or grade and goals
- We’ll suggest a suitable class or learning path
- We’ll confirm format, timing and fees with a parent or guardian