Single digit addition worksheets
Twenty-five basic addition facts in big, friendly type — the very first worksheet format.
Best fit: K–1st grade · Answer key included · Free, no sign-up
Answer key
The same sheet with every answer shown in blue — print it for marking, or hand it over for self-checking.
About these worksheets
Single-digit sums are the first written math most children meet, so this sheet keeps everything gentle: 25 problems, large type, plenty of white space, and the familiar vertical layout they’ll use for years. Sums stay within 18 (9 + 9). Pair it with ten frames or a number line so the strategies stay visual while the facts become automatic.
Need a different set?
The generator makes unlimited versions of this worksheet — choose the operation and difficulty, and every click is a brand-new sheet with its own answer key.
Frequently asked questions
What ages are these addition facts for?
Kindergarten and 1st grade, or any child working on addition facts within 20 for the first time.
Should children count on fingers?
Early on, yes — fingers, counters and ten frames are how the facts get built. Fluency comes from repetition after understanding, not instead of it.
Is there an answer key?
Yes, the identical sheet with answers in blue is below the worksheet.