Addition Facts Worksheets — Free Printable PDF
Free printable addition facts worksheets in PDF, with an answer key on every sheet. Forty addition facts within 20 in mixed order — ideal for a quick fluency drill at home or in class.
Get the worksheet
One click, no account. Prints on letter paper with the answer key on page 2.
🗎 Get the PDF (free)PDF · 2 pages · worksheet + answer key
What’s on this worksheet
Forty addition facts within 20 in mixed order, with plenty of writing space. Practising facts to automatic recall is the foundation for mental math and multi-digit addition. The answer key is on page 2.
How to use it
Short daily practice builds fluency. A timed sheet of a few minutes, several times a week, helps children answer from memory instead of counting. Encourage them to revisit only the facts they hesitated on.
Aligned to Common Core (2.OA.B.2)
This worksheet supports Common Core 2.OA.B.2. The answer key on page 2 makes it easy for students to check their own work.
Prefer to practise on screen first? Try the free Addition Facts practice — tap or type answers with instant feedback, then print a worksheet to lock it in off-screen.
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Frequently asked questions
Are these addition facts worksheets free?
Yes — free PDF, no sign-up, for home or classroom use.
Do they include answers?
Yes, a full answer key is on page 2.
What grade are they for?
Grade 1–2 (Common Core 2.OA.B.2).
How many problems per sheet?
Forty problems in mixed order for a focused fluency drill.
Is there an online version?
Yes — try the interactive addition facts practice on any device.