9
-8
9
-7
17
-10
8
-5
17
-4
7
-1
15
-14
7
-1
2
-1
9
-8
5
-4
9
-5
8
-7
8
-4
16
-3
9
-4
16
-15
3
-2
8
-7
7
-2
Practice subtraction within 20 with free printable worksheets. Uniquely generated — reinforce key math skills with every set.
Frequently Asked Questions
How do I use this Subtraction Within 20 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.