2
+15
2
+7
4
+3
10
+6
10
+1
1
+17
7
+1
10
+8
2
+4
2
+14
1
+3
10
+10
3
+5
5
+10
5
+10
6
+3
4
+12
2
+2
3
+14
7
+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.