6
+13
10
+3
6
+1
4
+3
2
+13
10
+7
9
+10
10
+4
4
+11
6
+3
1
+18
6
+11
4
+3
2
+14
6
+2
9
+10
2
+4
5
+11
6
+2
2
+12
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.