Turn a worksheet into addition and subtraction flashcards within 20
Printable sets are fine for a quick drill, but a deck built from your own worksheets targets the facts your child is missing.
Make cards from the problems your child already practices
Printable addition and subtraction flashcards within 20 work for a quick drill, but a deck made from the exact worksheets your child is using targets the facts that are actually slowing them down.
- Upload a worksheet photo and text recognition reads the problems for you.
- Cover addition, subtraction, or both within 20 in one set.
- Spaced repetition brings back the facts you miss most often.
- Export to Anki or CSV on the Plus plan to keep practicing elsewhere.
Reads worksheets and photos
Upload a PDF, a photo of a page, or typed notes. Text recognition pulls out the problems so you do not have to retype them.
Mixes both operations
Build one set that covers addition and subtraction within 20, or split them into separate decks for focused practice.
Spaced repetition
Facts you miss come back sooner, so the easy ones stop taking up practice time.
How it works
Upload your material
Add a PDF, slide deck, notes file, or photo of a worksheet.
Generate flashcards
DeckOwl writes question-and-answer cards from the problems it finds in your material.
Study and review
Practice in the browser on the free plan. Export to PDF, DOCX, Anki or CSV on Plus.
Mastery at this level usually comes from repeated short practice on the same facts. Doubles like 7 + 7, make-ten combinations like 8 + 5, and counting back from 17 are common sticking points that a focused deck can target.
DeckOwl reads your worksheet or notes and writes question-and-answer cards from the problems it finds. Spaced repetition then shows missed facts more often, so practice time goes where it is needed.
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Frequently asked questions
How many addition and subtraction facts within 20 should a flashcard set include?
Start with 10 to 15 cards grouped around one strategy, such as doubles or make-ten facts. Include the subtraction partner of each addition fact so the set covers both operations.
How do I help a child practice addition and subtraction within 20 at home?
Short daily sessions of five to ten minutes work better than long weekly drills. Ask the child to explain how they got each answer, not just say it quickly.
Can I study the flashcards on my phone?
The free plan lets you study in the browser with 3 generations per month. Exports to PDF, DOCX, Anki and CSV are part of the paid Plus plan at $39/year or $7.99/month.
Can I print the flashcards?
Printing is not a listed feature, but PDF export is included in the Plus plan at $39/year or $7.99/month. The free plan does not include exports, so you can study the cards in the browser instead.
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