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