10
+4
10
+3
2
+5
2
+16
5
+11
4
+11
3
+5
1
+14
5
+12
3
+11
4
+10
5
+3
2
+2
2
+14
3
+12
10
+7
1
+7
7
+12
6
+3
3
+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.