5
+10
10
+9
5
+10
8
+1
3
+2
4
+12
7
+10
1
+1
5
+3
2
+5
10
+8
3
+4
3
+10
2
+12
2
+6
2
+13
5
+10
5
+2
10
+1
7
+12
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.