13
-1
9
-5
13
-10
8
-7
16
-2
3
-1
3
-1
18
-16
7
-3
5
-1
6
-2
2
-1
18
-2
19
-10
17
-3
17
-11
12
-1
4
-2
8
-5
5
-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.