5
+4
2
+12
2
+13
10
+2
2
+2
1
+17
10
+8
4
+1
4
+3
8
+11
7
+11
2
+11
2
+4
5
+14
5
+14
7
+12
7
+2
1
+12
9
+10
7
+12
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.