7
+10
6
+10
1
+16
1
+12
8
+1
7
+11
2
+11
2
+11
10
+9
4
+13
10
+1
5
+4
4
+1
2
+2
2
+4
2
+15
10
+5
3
+12
3
+6
3
+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.