Turn your own addition practice into flashcards for 1 to 20
Ready-made printable sheets are everywhere, but DeckOwl builds a set from your own material. The free plan studies in the browser, and PDF export for printing is included in Plus.
Why a custom deck beats a generic printable
Many printable addition sheets cover 1 to 20 in the same fixed order, but printable addition flashcards for numbers 1 to 20 work better when they match the facts your class is practicing. Start with a worksheet photo or your notes, and the cards follow those problems.
- Doubles: 4 + 4, 7 + 7, 9 + 9
- Make-ten pairs: 9 + 3, 8 + 2, 6 + 4
- Near doubles: 5 + 6, 7 + 8, 8 + 9
- Counting on from the larger number
From your own pages
Upload a photo of a worksheet, a PDF or typed notes, and get cards that match the problems your class is actually practicing.
Spaced repetition
Cards you miss come back sooner, so sums from 1 to 20 stick without endless drilling.
Print with Plus
PDF export is included in Plus, so you can print your deck. The free plan stays in the browser.
How it works
Add your material
Upload a PDF, a photo of a worksheet, or your notes.
Generate cards
DeckOwl writes a front and back for each addition fact it finds in your material.
Study or export
Study free in the browser, or export to PDF on Plus.
Addition facts within 20 usually fall into a few patterns: doubles like 6 + 6, near doubles like 6 + 7, and make-ten pairs like 9 + 4. Mixing these in one deck helps recall come faster than drilling one row at a time.
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Frequently asked questions
How many addition flashcards should I make for numbers 1 to 20?
Start with about 20 to 30 cards so each sum family stays manageable. Add more once the early cards feel easy, and keep each deck focused on the facts you miss.
What order should students learn addition facts from 1 to 20?
Many teachers start with doubles and make-ten facts, then move to near doubles and sums that cross ten. Practice each group until answers come quickly before mixing them together.
Can I print DeckOwl flashcards for free?
The free plan studies in the browser and does not include exports. PDF export is part of Plus, which costs $39/year or $7.99/month.
Do I need a credit card to try it?
No, you can start without a credit card. Students with a school email get 40% off Plus.
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