# How to write an expression Writing Expressions

Basic expressions. Write an expression for " more than ". Write an expression for " minus ". Write an expression for " divided by ". Write an expression for " multiplied by ". Write an expression . The expression 9 + 8 represents a single number (17). This expression is a numerical expression, (also called an arithmetic expression). The expression 9 + x represents a value that can change. If x is 2, then the expression 9 + x has a value of If x is 6, then the expression has a value of So 9 + x is an algebraic expression. In the next few examples, we will be working solely with algebraic expressions.

Problem: Ms. Jensen likes to divide her class into groups of 2. Use mathematical symbols to represent all the students in her class.

In the problem above, the variable g represents the number of groups in Ms. Jensen's class. A variable is a symbol used to represent a number in an expression or an equation. The value of this number can vary change.

Let's look at an example in which we use a variable. This expression is a numerical expressionalso called an arithmetic expression. If x is 6, then the expression has a value of In the next few examples, we will be working solely with algebraic expressions. In Wrie 2, each algebraic expression consisted of one number, one operation and one variable.

How much money will each employee get? Solution: Let e represent the number of employees in the company. The amount of money each employee will get is represented hpw the following algebraic expression:.

Write an algebraic expression to represent his earnings for one day. Solution: Let x represent the number of hours the electrician works in one day. The electrician's earnings can be represented by the following algebraic expression:.

Summary: A variable is a symbol used to represent a number in exprression expression or an equation. The value of this number can change. An algebraic expression is a mathematical expression that consists of variables, numbers and operations. The value of this expression can change. Directions: Choose the algebraic expression how to create a theme statement correctly represents the phrase provided.

Select your answer by clicking on its button. If you make a mistake, choose a different button. Shop Math Games. Skip to main content. Search form Search. Solution: Let g represent the number of groups in Ms. Example 1: Write each phrase as a mathematical expression. Example 2: Write each phrase as an algebraic expression.

Example 3: Write each phrase as an algebraic expression using the variable n. The electrician's earnings can be represented by the following algebraic expression: Solution: 45x - 20 Summary: A variable is a symbol used to represent a number in an expression or an equation.

Exercises Directions: Choose the algebraic expression that correctly represents the phrase provided. The product of nine and a number, decreased by six 9 m - 6 6 9 - m 9m - 6 None of the above. Write an algebraic expression to represent the amount of money she will earn in d days.

Lessons on Pre-Algebra. Order of Operations. Order of Operations With Exponents. Order rubber band bracelets how to make them Operations with Integers.

Writing Algebraic Expressions. Writing Algebraic Equations. Practice Exercises. Challenge Exercises. Try our Order of Operations Worksheet Generator. Hlw our Pre-Algebra Worksheet Generator.

In these lessons, we will learn how to write algebraic expressions for word problems. We will start with some common phrases found in word problems. The following table gives some common words or phrases that are usually imply one of the four operations: add, subtract, multiply, divide. However, depending on the word problem, there are exceptions. Scroll down the page for more examples and explanations. Some examples of common phrases and corresponding expressions that involve addition are:.

Some examples of common phrases and corresponding expressions that involve subtraction are:. Some examples of common phrases and corresponding expressions that involve multiplication are:. Some examples of common phrases and corresponding expressions that involve division are:. Some examples of common phrases and corresponding expressions that involve two operations are:. An algebraic expression is a mathematical phrase that contains a combination of numbers, variables and operational symbols.

A variable is a letter that can represent one or more numbers. Examples: Write the algebraic expressions to represent the statements. First consider the expression for -5 plus the quantity of 4 times x Now take the product of -8 and that expression and then add 6. First consider the expression for the sum of 7 and the product of -2 and x What expression would be: 4 plus the quantity of 2 times that expression.

This video teaches how to dissect a word problem in order to define a variable and write an equation. Half of a number is Write an equation to represent the situation. Define your variable and solve. Gaddie has two dogs. Her friend Anna-Marie has three less than twice as many as Mtr.

How many dogs does Anna-Marie have? A recycling plant recycles 2 tons of cans yesterday. This is a third of their usual amount. How much does the plant usually recycle?

Example: Translate the following phrases into algebraic or numeric expressions. Try the free Mathway calculator and problem solver below to practice various math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations. We welcome your feedback, comments and questions about this site or page. Please submit your feedback or enquiries via our Feedback page.

Related Pages Writing Expressions Lesson 16 Writing Expressions Lesson 17 Algebraic Expressions The following table gives some common words or phrases that are usually imply one of the four operations: add, subtract, multiply, divide.

Phrase To Algebraic Expression To write an expression, we often have to interpret a written phrase.

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