10
+8
9
+10
8
+10
5
+2
2
+5
2
+3
1
+5
7
+10
10
+6
4
+2
5
+4
5
+3
2
+2
6
+10
10
+9
2
+5
2
+3
10
+4
4
+2
6
+3
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.