9
-4
19
-6
9
-5
8
-5
12
-10
18
-1
8
-7
5
-4
5
-4
4
-3
19
-11
8
-2
7
-4
8
-5
16
-11
9
-2
8
-7
17
-13
4
-1
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.