Free Addition Missing Number Worksheet - 15
Every numbered variant of this worksheet tests the exact same Missing Number skill with a fresh, deterministically-generated set of numbers, so a child who needs more repetition can work through several without ever seeing the identical page twice.
For extra practice on this exact skill, print a few different numbered variants rather than repeating this one page — each uses a different set of numbers while testing the identical Missing Number rule.
Missing Number is one of the skills researched specifically for Grade 1's math curriculum — the range here is drawn from the Common Core K-5 progression and cross-checked against what established publishers put in front of students at this level.
Frequently asked questions
The range researched specifically for Missing Number 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 Missing Number skill with fresh numbers.
Both Letter and A4 are supported automatically — nothing to configure, the same PDF prints correctly on either page size.
