Transcript Math - Hamilton Local Schools

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?
What am I?
How did I
get here?
a
b
x
I am so
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)
b
2
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