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