Grade 1 Addition Worksheets — Sums Within 10
Free & unlimitedNo loginAnswer key includedCCSS 1.OA.6
First grade addition lives within 10: this is where students move from counting-all to counting-on, and start using doubles and make-a-ten strategies. These worksheets drill sums within 10 with a balanced mix — every combination appears before any repeats, so practice covers the whole fact space.
Print 25 problems for morning work, 50 for centers, or 100 for review. Every sheet includes a name/date header and an answer key page for fast checking.
🖨 Generate this worksheet free Practice online insteadName ____________Date ______Score ____/25
12 + 4 = ____
21 + 9 = ____
37 + 1 = ____
41 + 7 = ____
51 + 0 = ____
69 + 1 = ____
73 + 3 = ____
80 + 2 = ____
91 + 2 = ____
104 + 5 = ____
113 + 7 = ____
122 + 3 = ____
131 + 5 = ____
148 + 2 = ____
156 + 2 = ____
Preview: first 15 of 25 problems (Addition within 10, CCSS 1.OA.6). Open the generator for the full sheet + answer key — or press “New set” for a completely fresh one.
💡 Watch how they solve, not just the score: a first grader counting fingers for 3+4 needs the doubles-plus-one strategy, not more repetition.
Frequently asked questions
- What addition should a 1st grader know?
- By end of grade 1 (CCSS 1.OA.6), students should add and subtract within 10 fluently, using strategies like counting on, making ten, and known doubles.
- Horizontal or vertical format for grade 1?
- Start horizontal (3 + 4 = __) — it matches how equations are read aloud. Introduce the stacked vertical format in grade 2 when written algorithms begin.