16
-11
14
-12
17
-14
4
-2
3
-1
6
-2
9
-6
14
-11
7
-3
13
-1
11
-1
7
-3
14
-2
4
-3
17
-12
15
-5
20
-10
9
-5
4
-3
2
-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.