1
+6
1
+10
2
+5
4
+2
3
+3
6
+2
4
+3
1
+6
2
+2
3
+4
5
+2
2
+1
3
+5
6
+3
6
+10
8
+1
3
+5
10
+9
3
+10
4
+1
Practice addition facts with free printable worksheets. Uniquely generated — reinforce key math skills with every set.
Frequently Asked Questions
How do I use this Addition Facts 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.