17
-2
3
-1
5
-2
15
-5
5
-4
18
-15
7
-6
6
-1
9
-7
3
-1
12
-2
8
-4
9
-8
6
-5
19
-10
12
-10
18
-10
4
-2
8
-5
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.