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CCSS.MATH.CONTENT.2.OA.2

Add and subtract within 20.

Description

Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers.

This unit is to be used with second grade students to teach addition and subtraction strategies, or remediate with students needing extra practice.  

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

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The teaching and learning for this unit will be both face to face, as well as online. For young students, it is important to find the proper blend of both types of teaching/learning. Students will be not only learning which numbers are odd and even, but how to identify them and explain how they know they are odd or even.

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