4
+1
3
+5
10
+9
7
+10
2
+1
4
+4
3
+10
1
+13
2
+15
4
+13
2
+6
3
+2
1
+11
3
+12
1
+16
3
+11
4
+10
6
+1
1
+11
5
+14
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.