2
-1
4
-2
17
-1
7
-6
12
-1
3
-1
5
-4
17
-6
15
-12
17
-4
9
-3
6
-5
15
-5
16
-12
3
-1
12
-2
16
-11
16
-3
15
-12
9
-4
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 Starter 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.