2
-1
2
-1
6
-5
5
-3
3
-2
3
-2
8
-2
19
-16
15
-12
18
-4
15
-1
5
-3
7
-3
18
-6
9
-5
4
-1
8
-3
17
-16
5
-2
16
-5
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.