3
+13
5
+1
1
+3
7
+1
8
+11
10
+9
10
+10
5
+10
5
+10
9
+10
6
+13
6
+13
3
+3
3
+1
2
+2
1
+2
8
+1
1
+7
1
+12
10
+2
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.