4
+14
3
+3
5
+4
5
+10
10
+7
10
+7
4
+5
6
+12
5
+14
4
+15
2
+12
5
+13
6
+11
6
+10
10
+10
8
+10
10
+2
1
+14
5
+14
1
+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 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.