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Dear LOR user,

Thank you for being a big part of this community. To better support the initiatives around open educational resources in the state of Michigan, all resources on the Michigan Virtual Learning Object Repository (LOR) are being moved to #GoOpen Michigan (link is external) on September 30th, 2018. During the transition, our LOR will be moved to an archived state, not allowing new user registration or new content to be added. An email with more details was sent to registered users of the LOR in September. To make use of the great resources on the platform, we encourage you to create an account and add your own new resources to the #GoOpen Michigan platform (link is external).


Use place value understanding and properties of operations to add and subtract.


Add up to four two-digit numbers using strategies based on place value and properties of operations.

This unit revolves around the math curriculum Math Expressions for 2nd grade Unit 1: Addition and Subtraction within 20.  

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