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CCSS.MATH.CONTENT.3.NBT.2

Use place value understanding and properties of operations to perform multi-digit arithmetic.

Description

Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction. (A range of algorithms may be used.)

 In this unit, 3rd graders practice making sense of one and two step number stories involving all four operations.  Practice may include diagrams, arrays, pictures, words, and number models.

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