3
+16
10
+2
1
+15
2
+13
1
+1
6
+1
3
+1
4
+12
10
+4
3
+12
2
+5
7
+11
5
+10
7
+11
10
+3
4
+15
1
+11
10
+7
5
+3
4
+13
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.