10
+4
9
+10
10
+9
1
+2
2
+11
8
+11
6
+2
1
+7
5
+14
5
+14
9
+10
8
+1
10
+10
9
+10
4
+1
10
+4
10
+7
7
+1
3
+16
1
+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.