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