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