Free Addition Within 20 Worksheet - 18
A child working through this page is practicing Addition at the Within 20 level — a specific, deliberately scoped skill, not a generic pile of problems loosely labeled by grade.
This worksheet is Within 20 Addition practice for Grade 1, with the number range matched specifically to what Grade 1 actually covers — not a rounded-up or rounded-down guess at difficulty.
This is basic Within 20 practice at the Grade 1 level — straightforward enough that a parent or teacher can check the answers at a glance, so the page stays focused on practice, not paperwork.
Frequently asked questions
The range researched specifically for Within 20 Addition at Grade 1, matching the Common Core K-5 progression rather than a generic difficulty guess.
This exact page always shows the same numbers (so it's stable for bookmarking or sharing), but the hub page above links to dozens of other numbered variants testing the identical Within 20 skill with fresh numbers.
Both Letter and A4 are supported automatically — nothing to configure, the same PDF prints correctly on either page size.
