4
+15
4
+5
2
+5
3
+10
10
+5
2
+6
5
+13
10
+4
1
+2
10
+6
4
+10
5
+1
6
+13
2
+5
5
+1
4
+15
2
+16
10
+4
3
+3
10
+6
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.