Turn your addition to 20 practice sheet into printable flashcards
Ready-made printables cover generic sums. Upload your own worksheet, slides or notes and get flashcards built from the facts your class is actually working on, with spaced repetition to keep them fresh.
Why generate your own addition to 20 cards
Most ready-made printable flashcards for addition to 20 are generic, so they rarely match the exact strategies your class is using. A card built from your own worksheet keeps the same number patterns and wording your teacher uses.
- Works from PDFs, slides, notes and photos of worksheets
- Covers sums up to 20 using the same problems as your own material
- Spaced repetition brings back the facts you miss
- PDF export is included on the Plus plan
Built from your material
Upload a PDF, DOCX, PPTX, plain text file or a photo of a worksheet, and the cards follow the problems your teacher assigned.
Spaced repetition
Cards you miss come back more often, so the sums you find hard get extra practice while the easy ones appear less.
PDF export on Plus
Export your set to PDF on the Plus plan and print it for paper practice, or study in the browser on the free plan.
How it works
Upload your sheet or notes
Add the addition to 20 worksheet, a photo of the page, or typed notes.
Review the generated cards
Check the sums and answers, then start studying in the browser with spaced repetition.
Export and print
On Plus, export the set to PDF and print it for paper practice.
Making the set yourself also takes less time than hunting for a free sheet and cutting it out. Upload the page, review the cards, and the set is ready to study or print.
Spaced repetition then does the sorting for you. Sums you answer quickly appear less often, and the ones that still slow you down come back until they become automatic.
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Frequently asked questions
How do I practice addition to 20 at home?
Start with doubles and make-a-ten facts, since they unlock many other sums. Practice in short sessions and review the cards you miss more often than the ones you know.
What is the fastest way to learn sums to 20?
Learn the doubles from 1 + 1 to 10 + 10 first, then practice making ten, such as 9 + 6 becoming 10 + 5. Quick recall comes from repeated practice over several days, not one long session.
Can I print my DeckOwl flashcards?
Yes, PDF export is included in the Plus plan, which costs $99.90 per year or $9.99 per month. The free plan lets you study in the browser but does not include exports.
What can I upload to make the cards?
You can upload PDFs, DOCX and PPTX files, plain text notes, or images of pages, which are read with text recognition. You can start without a credit card.
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