4
+10
8
+10
3
+4
5
+4
4
+13
2
+17
10
+4
10
+4
5
+11
1
+6
7
+11
5
+4
5
+2
10
+9
10
+4
3
+15
10
+8
1
+11
4
+4
3
+16
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.