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