1
+17
10
+1
6
+12
3
+5
4
+15
6
+3
2
+5
6
+12
6
+12
4
+10
10
+1
6
+11
4
+2
7
+12
5
+10
1
+18
4
+2
10
+1
6
+3
10
+8
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.