4
+11
3
+12
2
+10
2
+3
1
+5
8
+11
1
+8
10
+5
5
+3
1
+1
1
+3
6
+2
4
+12
10
+5
4
+4
10
+4
3
+2
2
+13
1
+16
2
+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 Starter 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.