1
+12
10
+9
8
+11
10
+2
10
+4
2
+16
1
+6
7
+11
10
+10
3
+11
4
+3
5
+12
10
+7
1
+3
1
+1
1
+11
4
+3
6
+11
1
+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.