1
+6
4
+15
7
+12
2
+6
1
+13
10
+6
2
+15
2
+11
10
+10
2
+13
2
+15
7
+11
4
+15
3
+3
4
+12
3
+13
2
+15
2
+13
5
+14
1
+13
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 Starter 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.