4
-3
18
-5
2
-1
14
-11
18
-6
7
-5
2
-1
17
-14
6
-5
16
-1
7
-1
12
-1
3
-2
15
-3
18
-5
9
-6
17
-1
5
-3
13
-2
6
-3
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.