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