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