12
-11
4
-2
6
-4
9
-5
16
-12
17
-14
6
-2
8
-7
18
-10
15
-12
6
-3
6
-5
16
-12
14
-10
4
-3
2
-1
4
-3
5
-1
15
-12
17
-13
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.