About this printable
This free addition worksheet gives kindergarten and first-grade students focused practice with single-digit sums up to 20. Each of the 20 problems is laid out with generous spacing so young learners have room to count, draw, or show their work.
It is built for the way real classrooms and kitchen tables work: print it, hand it over, done. No prep, no login, no watermark — and the included answer key lets a teacher, sub, or parent check work in seconds.
What's included
Page 1 — 20 addition problems with sums to 20
Page 2 — a second set for extra practice or a retake
A full answer key for quick grading
Print-ready PDF sized for US Letter and A4
Learning objectives
Add two single-digit numbers with sums up to 20
Build addition fluency and number sense
Practice neat, organized written work
Frequently asked questions
Is this addition within 20 really free?
Yes. Download the PDF instantly — no account, no email and no payment required. Email is only needed for the curated starter bundle.
Can I print it at home?
Yes. It is formatted for US Letter and A4 paper and prints cleanly.
What grade level is it for?
It is designed for kindergarten and first grade, covering single-digit addition with sums up to 20. It also works as review for struggling second graders.