10
+7
10
+8
1
+5
5
+13
2
+4
1
+15
4
+12
6
+13
5
+11
2
+14
2
+13
6
+3
7
+1
10
+4
1
+17
3
+10
3
+16
4
+1
2
+6
3
+16
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.