15
-5
5
-1
5
-1
4
-3
19
-2
18
-12
18
-14
2
-1
15
-3
8
-2
11
-1
14
-1
16
-3
3
-1
16
-5
7
-3
2
-1
15
-11
16
-15
9
-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.