1
+12
5
+13
2
+5
2
+7
1
+4
10
+4
8
+1
3
+11
10
+8
2
+16
8
+10
6
+2
2
+12
6
+2
6
+2
3
+2
1
+13
3
+10
5
+12
8
+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 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.