When and Where I Found It: For my math unit, I am using the textbook Course 2 Mathematics (Charles, Branch-Boyd, Illingworth, Mills, & Reeves, 2004). On page 11, the authors identify Commutative Property of Addition as a "new vocabulary" term.
Charles, R. I., Branch-Boyd, J. C., Illingworth, M., Mills, D., Reeves, A., & Thompson, D. R. (2004). Course 2 mathematics. Upper Saddle River, NJ: Pearson Prentice Hall.
Meaning: According to Charles, Branch-Boyd, Illingworth, Mills, & Reeves (2004), the commutative property of addition means that "changing the order of the addends does not change the sum" (p. 12). The examples of this property given in the textbook are:
Arithmetic: 1.2 + 3.4 = 3.4 + 1.2 Algebra: a + b = b + a
(Charles, Branch-Boyd, Illingworth, Mills, & Reeves, 2004, p. 12)
Level of Familiarity: I was familiar with this term before, but was reminded of the meaning while working on this project.
Do I Want to Know This Word Well? Why? I want to know this word well. Whether I end up as an elementary teacher or a literacy specialist, I will most likely come across the need to work on math with my students. If I do not know the various properties of addition and multilpication (which are often difficult for students to learn), I will be unable to teach appropriately. Commutative Property is a vocabulary term that I may be able to work on with students as a literacy specialist, even if I am not their general math educator.
Do I Want Others to Know this Word Well? Who and Why? All elementary teachers should know this term, as well as the other properties. Any teacher may be called upon to help a student in a difficult area. Knowing the properties of addition and subtraction well will allow general educators as well as literacy specialists to work together to teach students.
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