5
+11
1
+7
8
+1
7
+10
2
+6
4
+12
3
+16
5
+14
4
+3
3
+10
1
+15
4
+2
6
+12
4
+15
10
+1
4
+2
1
+11
3
+15
5
+11
2
+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 Hard 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.