10
+1
1
+1
1
+12
5
+13
10
+10
4
+13
1
+13
3
+4
10
+5
4
+2
1
+11
3
+2
2
+10
4
+15
10
+6
7
+1
7
+10
10
+7
10
+4
7
+11
Practice addition within 20 with free printable worksheets. Uniquely generated — reinforce key math skills with every set.
Frequently Asked Questions
How do I use this Addition Within 20 Expert Worksheets worksheet?
Print the worksheet and complete the problems. Each set number generates a unique arrangement. Use the same set number for all students in a class for consistent assessment.
Is there an answer key?
Yes — every worksheet includes a complete answer key. Print it separately or view it on screen.