8
+1
7
+11
6
+3
3
+5
6
+13
6
+11
4
+3
1
+8
4
+12
9
+10
2
+16
6
+11
2
+5
8
+1
3
+4
5
+4
1
+10
2
+15
10
+7
5
+1
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.