Treat subtraction as finding a missing addend: to solve 12 - 9, ask what added to 9 makes 12.
Standards are described in our own words. Read the official Common Core document.
© Copyright 2010. National Governors Association Center for Best Practices and Council of Chief State School Officers. All rights reserved.
Tell us what would help your class practice it.
Each worksheet is matched to the skills it practices, and this standard to the skills it asks for. Everything here shares at least one of them. All of it is free to print and use.
