Excerpt 5: Number & Operations in Base Ten in Grade 3 (Page 11)

Description: One of a series of documents describing the progression of a topic across several grade levels, informed both by research on children's development and by the structure of mathematics. Use place value understanding and properties of operations to perform multi-digit arithmetic Students continue adding and subtracting within 1000. 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.