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