9 + 6
Show answer
15
Free printable worksheet
Addition Facts (11-20) Worksheet
Twenty addition facts with sums from 11 through 20.
Elementary MathGrades 1-33 pagesAnswer key included
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What this worksheet includes
- Twenty addition facts with sums from 11 through 20.
- 3-page printable PDF with a complete answer key
- Designed for Grades 1-3 elementary math practice
- Available as an immediate free download with no email required
How to use it
Use this addition facts (11-20) worksheet for guided practice, independent review, homework, tutoring sessions, or a quick skills check. The spacious layout is designed to leave room for students to show their work rather than guess from crowded answer choices.
After students finish, compare their reasoning with the included answer key. When an answer is incorrect, have the student locate the first step where their work changed direction before trying the problem again.
Who this practice is for
This resource is designed for grades 1-3 students working on elementary math. Teachers, tutors, homeschool families, and parents can preview the first page before deciding whether the level and spacing fit the student.
Looking for a broader sequence? Browse all Elementary Math worksheets.
Topic guide
How to approach addition facts (11-20)
Addition facts through 20 build on combinations that make 10. Breaking apart one addend can turn an unfamiliar fact into a known ten fact plus a smaller amount.
Students should notice doubles and near doubles as well as make-ten combinations. These relationships reduce counting and strengthen later mental arithmetic.
Learning objectives
- Add with sums from 11 through 20
- Decompose an addend to make 10
- Use doubles and near doubles
Skills to review first
- Addition within 10
- Number bonds for 10
- Counting through 20
Worked example
Follow the reasoning step by step
Find 8 + 7.
- Notice that 8 needs 2 to make 10.
- Break 7 into 2 + 5.
- Add 8 + 2 = 10.
- Then add 10 + 5 = 15.
Solution: 8 + 7 = 15.
Try before downloading
Three sample problems
Work each problem, then open the answer to check your result.
7 + 8
Show answer
15
12 + 5
Show answer
17
Error check
Common mistakes to watch for
- Stopping at 10 after decomposing
- Changing the total while regrouping an addend
- Counting all objects instead of counting on