9
-1
18
-7
13
-12
6
-2
15
-13
18
-10
6
-3
17
-10
9
-4
14
-12
19
-14
4
-3
19
-15
6
-1
19
-4
8
-6
3
-1
17
-4
17
-14
16
-15
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.