Turn a worksheet into addition and subtraction flashcards
Upload a worksheet photo, slides or notes covering sums and differences up to 18, and get flashcards with spaced repetition. Start free, no credit card needed.
Custom addition and subtraction practice from your own pages
Most printable sets stop at a fixed list, but a child working through sums up to 18 usually needs cards that match the exact facts their class is covering. Upload a worksheet photo, your teacher's slides or handwritten notes to DeckOwl, and the AI turns them into addition and subtraction flashcards you can study in the browser right away.
- Works from photos of worksheets, not just typed text
- Cards cover sums and differences within 0 to 18
- Spaced repetition schedules review for facts you miss
- Export to Anki or PDF on the Plus plan
Reads your worksheets
Upload a PDF, DOCX, PPTX, notes or a photo of a page, and text recognition pulls out the problems.
Spaced repetition
Cards you miss come back sooner, so practice goes to the facts that need it most.
Export when you need it
On the Plus plan, export to PDF, DOCX, CSV or Anki for printing or other study apps.
How it works
Add your material
Upload a worksheet, slides or a photo of practice problems covering 0 to 18.
Generate cards
DeckOwl builds flashcards with the addition and subtraction facts from your pages.
Study and review
Practice in the browser and let spaced repetition set the order of review.
Spaced repetition brings back the facts you miss more often, so the ones that keep tripping you up, like 13 minus 6 or 7 plus 8, show up sooner than the ones you already know. Parents and tutors can also work from one source, a single page of practice problems, instead of hunting for a new printable every week.
The free plan includes 3 generations per month and studying in the browser. Exports to PDF, DOCX, CSV or Anki are part of Plus, which is $99.90/year or $9.99/month, and students can get 40% off with a school email.
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Frequently asked questions
How many addition and subtraction facts should a child practice at once?
Most children do better with a small set of facts they are still learning, then add more once those feel automatic. Start with sums and differences that stay below 10, and move up toward 18 as accuracy improves.
How can I practice subtraction facts up to 18 without just memorizing them?
Pair each subtraction card with its addition partner, so 13 minus 6 is checked by 6 plus 7 making 13. Saying the fact out loud and explaining it to someone else also builds understanding.
Is DeckOwl free to use for flashcards?
The free plan includes 3 generations per month and studying in the browser. Exporting to PDF, DOCX, CSV or Anki requires Plus, which is $99.90/year or $9.99/month.
Can I export these flashcards to Anki or print them?
Yes, the Plus plan lets you export to Anki, PDF, DOCX or CSV. The Pro plan adds bulk upload and QTI 2.1 and Moodle XML export for teachers who use a learning management system.
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