16
-12
9
-7
9
-4
18
-5
15
-3
2
-1
3
-1
17
-6
6
-5
2
-1
18
-4
9
-5
13
-10
4
-2
5
-3
4
-2
7
-3
8
-4
8
-7
5
-1
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.