10
+2
3
+13
2
+11
5
+1
3
+12
1
+15
10
+2
6
+10
3
+3
2
+3
2
+7
3
+10
4
+1
2
+6
1
+15
1
+17
7
+12
1
+13
5
+10
2
+16
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.