Common Core State Standard: 3.NBT.2

Grade 3
Subject MATH
Domain Number & Operations in Base Ten
Theme Use place value understanding and properties of operations to perform multi-digit arithmetic
Standard 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.)
Reference URL http://www.corestandards.org/Math/Content/3/NBT
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