18
-6
15
-10
16
-5
9
-5
5
-2
18
-2
6
-4
15
-5
2
-1
7
-1
3
-1
5
-1
18
-14
5
-2
3
-1
11
-10
9
-5
6
-5
6
-1
14
-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.