6
+1
4
+4
8
+11
1
+11
4
+10
9
+10
10
+6
10
+4
1
+7
2
+12
2
+4
2
+5
10
+6
8
+10
1
+1
6
+11
4
+13
2
+3
10
+9
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 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.