3
-1
15
-12
17
-1
16
-5
4
-2
9
-1
18
-2
3
-2
15
-10
2
-1
8
-1
16
-10
7
-2
13
-10
6
-1
15
-2
3
-2
6
-1
6
-4
19
-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.