16
-12
3
-1
15
-13
4
-1
8
-5
18
-8
17
-10
19
-15
2
-1
7
-4
13
-11
19
-5
5
-4
8
-1
5
-3
8
-5
19
-11
17
-13
12
-1
19
-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.