# Math

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```					Math

Translating Algebraic Expressions

By: Darala Hartwell
Remember:
1. A variable is a letter used to represent an unknown value.
2. A numerical expression includes numbers and operations.
3. An algebraic expression contains variables, numbers and operations.
What do I represent?

How did I
What am I?          get here?
x
a
I am so
b                             unknown

y

Variables are letters that represent unknown values.
Numerical Expressions

Numerical expressions include numbers and operation symbols.
Algebraic Expressions

An algebraic expression includes:

Numbers        Operations     and Variables
Let’s look at examples of a numerical expressions:

12 + 3

32
8

7(4)
Let’s look at examples of algebraic expressions.

x-4

2(5+n)

2
b
Equations
Algebraic expressions like phrases in English are incomplete.
An equation, like a sentence, is complete. You will notice the
inclusion of a very special symbol.

An equation is made up of numbers, variables,
and an equal sign.

3b + 5 = 26
Rewrite these verbal expressions as algebraic expressions.
1. the sum of s and 12
s+12
2. the product of 15 and some number
15n
3. n to the seventh power
n7
4. 56 increased by twice a number
56+2a
5. Four less than a number
n-4
Let’s write equations for these sentences.

1. Forty-three less than n is equal to 35.

n – 43 = 35

2. Seven more than y is 13.

y + 7 = 13
The End

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