18
-15
16
-6
3
-2
6
-1
13
-1
9
-5
19
-15
4
-2
16
-6
8
-3
3
-2
18
-15
18
-11
3
-2
18
-3
6
-2
19
-16
2
-1
16
-5
17
-2
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.