Turn any addition worksheet into flashcards for facts to 20
Printable sheets are fine for a quick drill, but they can't tell which facts you miss. DeckOwl builds flashcards from the worksheet, notes, or page photo you already have.
Why custom cards beat a generic printable set
Printable addition facts to 20 flashcards are easy to find, but a generic sheet rarely matches the facts a learner actually misses. DeckOwl starts from the worksheet, class notes, or page photo you already have and turns them into cards you can review with spaced repetition.
- Group facts by strategy: doubles, near doubles, and making ten.
- Start with sums to 10, then move to sums of 11 to 20.
- Review new cards daily and repeat the ones you miss.
- Print or export only if you need a paper copy, which requires Plus.
Built from your own material
Upload a PDF, DOCX, PPTX, text file, or photo of a worksheet and get cards that match the facts on that page.
Spaced repetition
Facts you miss come back sooner, so the sums to 20 you struggle with get more practice than the ones you already know.
Quizzes and mind maps too
Turn the same material into multiple choice or true/false quizzes, or a mind map grouping facts by strategy like doubles and make-ten.
How it works
Upload your sheet or notes
Add a worksheet, class notes, or a photo of the page. Images are read with text recognition.
Review the generated cards
Check the addition facts to 20 and remove or edit any cards you want to change.
Study in short sessions
Review a few cards a day in the browser. Spaced repetition schedules the ones you miss.
Start by uploading the material, then check the cards that come out. The free plan includes three generations per month and browser study, and Plus adds unlimited generations plus PDF, DOCX, Anki, and CSV export.
Explore related topics
Addition and subtraction flashcards 0-20
Make 0-20 addition and subtraction flashcards from your own worksheet or notes.
Addition and Subtraction Flashcards to 20
Make addition and subtraction flashcards to 20 from your own worksheets or notes.
Addition and Subtraction Flashcards to 20
Custom addition and subtraction flashcards up to 20 from your own worksheet, made with AI.
Addition and Subtraction Flashcards
Make custom addition and subtraction cards within 20 from your own worksheets.
Addition Facts Flashcards From Your Notes
Custom addition facts flashcards from your worksheet, with spaced repetition built in.
Printable Addition Facts Flashcards
Turn your own sums or worksheets into flashcards you can export as PDF.
Addition Flash Cards 0-20 Custom Set
Custom addition flash cards for 0 to 20, built from your own worksheet. Study free in your browser.
Printable Addition Flashcards 1 to 20
Custom addition cards for 1 to 20 from your own worksheet or notes.
Frequently asked questions
How many addition facts to 20 should a child learn at once?
Most curricula start with sums to 10 and then extend to 20. Learn the doubles and make-ten facts first, then add the rest in small groups of five to ten.
What is the fastest way to memorize addition facts to 20?
Group facts by strategy, such as doubles, near doubles, and making ten, instead of memorizing a random list. Review a few new cards each day and repeat the ones that were missed.
Can I use printable addition flashcards instead of making my own?
Printable sets work for quick practice, but they cannot adapt to the facts a learner misses. DeckOwl builds cards from your own worksheet or notes, and the free plan lets you study them in the browser.
Can I export these cards to Anki or print them?
Export to PDF, DOCX, Anki, and CSV is a Plus feature at $39/year or $7.99/month. Students get 40% off with a school email, and the free plan includes browser study without exports.
Keep exploring the topic
Review the main ideas visually or practice recalling them.
Quiz Maker Using Pictures
Turn photos of diagrams and slides into practice quizzes with explanations.
Pub Quiz Richmond Question Generator
Turn your own notes or slides into pub quiz questions with answers and explanations.
Branches of Science Mind Map Maker
Upload your notes and get an editable mind map of the branches of science.
English Literature History Mind Map
Turn your notes or PDFs into an editable English literature history mind map.