# Write a variable expression to represent the phrase

## Writing basic expressions with variables

Testing Knowledge of Mathematical Phrasing for Addition Use the following questions and answers to help your student learn the correct way to formulate Algebraic expressions based on mathematical phrasing: Question: Write seven plus n as an Algebraic expression. Provide the student with opportunities to practice writing variable expressions from verbal descriptions. If so, what would that score be? Have the student make a chart or table that includes vocabulary that suggests operations along with the related symbols. Examples of Student Work at this Level The student does not sufficiently describe the quantity represented by the variable and writes incorrect expressions to represent the second quantity in each problem. When you have gone grocery shopping, you get a receipt with the sum of your grocery bill. Instructional Implications Review the concept of a variable. Provide many mathematical and real-world contexts that describe unknown quantities that can be represented by variables and variable expressions. Why or why not? What are some possible values for j or m? Let's try a few phrases and turn them into algebraic expressions for subtraction: Question: Write seven less n as an Algebraic expression. Questions Eliciting Thinking What does the variable stand for in your expression? Guide the student to represent the new quantity in terms of the variable e.

Once students learn these four basic forms of Algebraic expressions, they can then begin to form expressions that contain exponentials a number multiplied by itself a designated number of times and parentheticals Algebraic phrases which must be solved before performing the next function in the phrase.

Emphasize that variables represent quantities and should be explicitly described as such e.

## How to write an expression in math

Then present another quantity that is described in terms of the variable e. Questions Eliciting Thinking Can you solve for j or m? Deb Russell is a school principal who has taught mathematics at all levels. For instance, think about the word sum. The prices have been added together to give you the sum. Instructional Implications Challenge the student with more complex descriptions e. ID Testing Knowledge of Mathematical Phrasing for Addition Use the following questions and answers to help your student learn the correct way to formulate Algebraic expressions based on mathematical phrasing: Question: Write seven plus n as an Algebraic expression. When you have gone grocery shopping, you get a receipt with the sum of your grocery bill. Continue Reading. Examples of Student Work at this Level The student is unable to represent the quantities described with variables and variable expressions. Ask the student to clearly define the variable as a quantity and to write expressions for other quantities described in terms of the variable. Emphasize that variables represent quantities and should be explicitly described as such e. What operation is indicated by the phrase more than or fewer than?

The prices have been added together to give you the sum. Then ask the student to use the expression to calculate a specific quantity e.

### Using variables to write expressions

Let's try a few phrases and turn them into algebraic expressions for addition. Provide the student with opportunities to practice writing variable expressions from verbal descriptions. Examples of Student Work at this Level The student is unable to represent the quantities described with variables and variable expressions. Instructional Implications Challenge the student with more complex descriptions e. ID Emphasize that variables represent quantities and should be explicitly described as such e. The student records the wrong operation e. What are some possible values for j or m? Got It The student provides complete and correct responses to all components of the task. She is also a freelance writer with more than 14 years of experience. If Justin scored 8 points, how many points did Nadine score? When working in algebra, you will need to change words and phrases into some form of mathematical language.

The student is unable to use variables to represent numbers and write expressions. If Justin scored 8 points, how many points did Nadine score?

Instead, the student: Attempts to provide specific examples of numbers of points consistent with the descriptions. Questions Eliciting Thinking Can you solve for j or m?

Questions Eliciting Thinking Is the number of points scored by either person given in the problem? If so, what would that score be?

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