100 Addition Facts Within 20
A free printable 100 addition facts within 20 worksheet with an answer key. Solve as many as you can. Check your work with the answer key. Perfect for 2nd grade addition practice at home or in class.
- Size
- US Letter (8.5 × 11 in), fits A4
- 2 pages: the worksheet and its answer key
- Level
- Grade 2
- License
- Free for personal & classroom use
About this worksheet
A free printable 100 addition facts within 20 worksheet with an answer key. Solve as many as you can. Check your work with the answer key. Second graders usually finish it in 10 to 15 minutes. Have your child say each fact out loud while writing the answer.
On this sheet
75 problems, starting with 10 + 10, 7 + 3, 12 + 6, 6 + 5, 15 + 3, 13 + 5, 14 + 4, 8 + 3, 3 + 7, 8 + 10, 12 + 8, 4 + 10, 4 + 16, 8 + 2, and 61 more. The answers to all of them are on page 2.
Tips for using it
- Set a timer for 5 minutes and write your score at the bottom, then try to beat it next time.
- Skip the hard ones on the first pass and come back to them at the end.
- Use small objects like buttons or cereal to check tricky problems.
- Teach the make-10 trick early: 8 + 5 is the same as 8 + 2 + 3 = 13.
Printing tips
Download the PDF and print at 100% (or “fit to page” on A4). Page 1 is the worksheet and page 2 is the answer key with the answers in red; print just page 1 if you want to keep the answers for checking. The PNG shows page 1 only. Free for personal, family and classroom use.
