18
-4
7
-2
3
-2
5
-4
7
-4
4
-1
5
-3
18
-5
18
-7
19
-11
5
-3
16
-6
11
-1
17
-3
3
-2
4
-1
15
-13
20
-10
6
-3
18
-13
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.