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