9
-7
17
-10
2
-1
14
-11
19
-8
7
-5
8
-4
19
-6
16
-11
19
-17
19
-17
6
-5
14
-13
5
-1
15
-1
6
-3
15
-10
6
-1
16
-11
17
-12
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.