Mr. Williams
12.1 Writing Expressions and Equations GESD
jwilliams@gesd40.org
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Objective: Write variable 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.
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Addition Subtraction
plus the quotient of
the sum of fewer than
times added to minus
Division
increased by
Multiplication the product of
subtracted from
total the difference of
mutiplied by
less than
decreased by
more than
divided by
3

Match the words with the expression.
4 plus a number x
x minus 10
x ­ 10 6x
The product of a number x and 6
12 4 + x
x
12 divided by a number x
4

Circle the operation words.
Write the following words as expressions!
3 added to a number x The difference of 12 and a number x
The sum of 4 and a number x 9 less than a number x
5

We are going to break into groups.
Please listen carefully to the directions.
You will have about 10 minutes at each station.
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