10
+9
10
+10
2
+11
3
+10
4
+11
4
+13
2
+5
1
+7
2
+10
6
+13
2
+5
5
+1
2
+13
7
+11
3
+12
1
+7
6
+11
2
+6
10
+10
3
+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 Easy 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.