Grade 2 Addition Worksheets — Sums Within 20
Free & unlimitedNo loginAnswer key includedCCSS 2.OA.2
Second grade is where addition within 20 must become automatic — CCSS 2.OA.2 expects students to know all sums of two one-digit numbers from memory by year end. These sheets drill the full within-20 space, including the bridging facts (8+7, 9+6) that give students the most trouble.
Use the timed-test header option to turn any sheet into a weekly fluency check with a time and score line.
🖨 Generate this worksheet free Practice online insteadName ____________Date ______Score ____/50
19 + 11 = ____
25 + 8 = ____
36 + 12 = ____
48 + 8 = ____
510 + 8 = ____
610 + 4 = ____
714 + 2 = ____
80 + 20 = ____
913 + 5 = ____
107 + 3 = ____
119 + 10 = ____
1211 + 4 = ____
134 + 15 = ____
1419 + 0 = ____
153 + 14 = ____
Preview: first 15 of 50 problems (Addition within 20, CCSS 2.OA.2). Open the generator for the full sheet + answer key — or press “New set” for a completely fresh one.
💡 The hardest facts cluster around bridging ten: 7+8, 8+6, 9+7. If those are red on your Mastery Map, drill make-a-ten explicitly for a week.
Frequently asked questions
- What is 2.OA.2?
- The Common Core standard for grade 2: “Fluently add and subtract within 20 using mental strategies; by end of Grade 2, know from memory all sums of two one-digit numbers.”
- How many problems per page is right for grade 2?
- 50 is the sweet spot for a practice page; 25 works for morning work; 100 suits review weeks and timed mastery checks.