Math worksheets for 1st graders. Addition and subtraction within 20, building from single-digit facts to early double-digit work. Download, print, and practice.
First grade is when students move from counting to true computation. Our 1st grade worksheets focus on addition and subtraction within 20 — the critical skill set that forms the foundation for all future math. Easy worksheets keep sums within 10 for students still building confidence, while medium worksheets push to sums within 20.
These worksheets use 3-column formatting with larger numbers for readability. Each worksheet includes a separate answer key so students can self-check. Print them for daily morning math, homework practice, or skill reinforcement. Every download generates fresh randomized problems.