4
+15
10
+5
4
+12
10
+3
2
+10
5
+12
7
+11
10
+3
3
+3
2
+10
3
+2
4
+1
10
+10
1
+7
10
+3
1
+17
10
+4
5
+13
10
+6
5
+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 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.