10
+4
1
+5
3
+2
1
+10
5
+4
2
+4
5
+10
2
+1
4
+2
2
+10
6
+1
7
+10
1
+6
3
+2
5
+3
10
+3
6
+2
3
+1
1
+8
6
+10
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.