12.1 expressions and equations

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1 12.1 Writing Expressions and Equations Mr. Williams GESD [email protected] Objective: Write variable expressions and equations. Image: 'img_9379.jpg' www.flickr.com/photos/60991646@N00/262694744

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Page 1: 12.1 Expressions and Equations

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12.1 Writing Expressions and EquationsMr. Williams

[email protected]

Objective: Write variable expressions and equations.

Image: 'img_9379.jpg'www.flickr.com/photos/60991646@N00/262694744

Page 2: 12.1 Expressions and Equations

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Vocabulary Review:Variable Expression ­ an expression consisting of one or more numbers, variables, and operations to be performed.

Equation ­ a mathematical sentence with an equal ( = ) sign.

Page 3: 12.1 Expressions and Equations

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Addition Subtraction

Multiplication Division

plus

the sum of

increased by

total

more than

added to minus

the difference of

decreased by

fewer than

less than

subtracted from

times

the product of

mutiplied by

divided by

the quotient of

Page 4: 12.1 Expressions and Equations

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4 plus a number x

x minus 10

The product of a number x and 6

12 divided by a number x

Match the words with the expression.

4 + x

x ­ 10 6x

12  x

Page 5: 12.1 Expressions and Equations

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Circle the operation words.Write the following words as expressions!

3 added to a number x

The sum of 4 and a number x

The difference of 12 and a number x

9 less than a number x

Page 6: 12.1 Expressions and Equations

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We are going to break into groups.

Please listen carefully to the directions. 

You will have about 10 minutes at each station.