1
+15
3
+11
5
+11
7
+10
4
+10
1
+18
4
+10
9
+10
10
+5
6
+2
7
+10
4
+1
3
+13
2
+3
4
+3
7
+12
9
+10
1
+2
3
+10
10
+10
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.