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# Substituting To Evaluate Addition and Subtraction S.83 Problem 3 PowerPoint Presentation, PPT - DocSlides

alida-meadow | 2019-12-03 | General

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Substituting To Evaluate Addition and Subtraction S.83 Problem 3 a. Tom wrote an expression for the relationship depicted in the table as ID: 769073

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Substituting To Evaluate Addition and Subtraction S.83 Problem 3 a. Tom wrote an expression for the relationship depicted in the table as ๐ต + 2. Theresa wrote an expression for the same relationship as ๐ถ โ 2. Is it possible to have two different expressions to represent one relationship? Explain. b. What do you think the variable in each studentโs expression represents? How would you define them? 3. A train consists of three types of cars: box cars, an engine, and a caboose. The relationship among the types of cars is demonstrated in the table below. Number of Box Cars Number of Cars in the Train 0 2 1 3 2 4 10 12 100 102

Substituting To Evaluate Addition and Subtraction S.83 Problem 3 a. Tom wrote an expression for the relationship depicted in the table as ๐ต + 2. Theresa wrote an expression for the same relationship as ๐ถ โ 2. Is it possible to have two different expressions to represent one relationship? Explain. Possible Explanation: Both expressions can represent the same relationship, depending on the point of view. The expression ๐ฉ + ๐ represents the number of box cars plus an engine and a caboose. The expression ๐ช โ ๐ represents the whole car length of the train, less the engine and caboose. b. What do you think the variable in each studentโs expression represents? How would you define them? The variable ๐ช would represent the total cars in the train. The variable ๐ฉ would represent the number of box cars 3. A train consists of three types of cars: box cars, an engine, and a caboose. The relationship among the types of cars is demonstrated in the table below. Number of Box Cars Number of Cars in the Train 0 2 1 3 2 4 10 12 100 102

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