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