4
+5
1
+17
3
+2
1
+3
1
+15
2
+5
1
+1
10
+9
3
+6
10
+8
2
+7
2
+2
1
+16
5
+13
5
+11
2
+11
1
+2
1
+1
1
+3
4
+3
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.