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