8
+10
3
+5
7
+12
5
+2
3
+2
5
+11
4
+13
3
+14
4
+4
10
+3
3
+12
5
+1
5
+1
8
+1
7
+1
2
+15
1
+12
2
+1
3
+10
2
+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.