18
-16
3
-1
13
-11
15
-14
2
-1
6
-1
18
-10
17
-10
13
-1
4
-2
19
-2
5
-4
14
-10
19
-11
2
-1
12
-11
4
-2
16
-15
8
-1
16
-3
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.