Free Addition & Subtraction Mixed Review Worksheet - 25
Mixed Review 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.
If this specific number range feels too easy or too hard, the hub page above lists every other skill available at Grade 1 for Addition & Subtraction, so it's easy to move up or down without hunting through menus.
Every numbered variant of this worksheet tests the exact same Mixed Review 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.
Frequently asked questions
The range researched specifically for Mixed Review Addition & Subtraction 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 Mixed Review skill with fresh numbers.
Both Letter and A4 are supported automatically — nothing to configure, the same PDF prints correctly on either page size.
