Formulating expressions,
equations, & Inequalities
PRE-ALGEBRA
MRS. YOW
DCMS stands for??
DeSoto Central Middle School!!!!
BFF stands for???
What about?
LOL???
GTG?
TTYL??
What about??
What is a VARIABLE???
A letter that stands for…..
A NUMBER!
NEW VOCABULARY!
 VARIABLE – a letter that stands for a number
 ALGEBRAIC EXPRESSION – a mathematical
expression that contains one or more variables
 EX: x+5
 NUMERICAL EXPRESSION – a mathematical
expression that contains ONLY numbers

EX: 3+5
ADDING WORDS (+)
PLUS
SUM
INCREASED BY
TOTAL
IN ALL
SUBTRACTING WORDS (-)
MINUS
DIFFERENCE
SUBTRACT
DECREASED BY
MULTIPLICATION WORDS (x)
TIMES
PRODUCT
MULTIPLIED
DIVIDING WORDS
DIVIDED
QUOTIENT
SEPARATED
Translate into algebraic expressions…..
Verbal Expressions
Algebraic Expressions
 The sum of a number,
 x+10
x, and 10
 The difference of 6 and
6
 3 times d
 6-r
 The quotient of 3 & y
 3d
3
 3  y or
y
MORE THAN
FEWER
THAN
5 more than x
x+5
7 less than d
d-7
500 fewer than y
y-500
LESS THAN
FLIP THE PROBLEM!!!
Write an algebraic EQUATION (=)
•
You buy 6 bottles of
sports drink. You also
buy a box of snacks that
costs $4.59. The bill is
$13.53. Which
equation would
determine how much
each bottle of sports
drink costs?
A. 6d=4.59+13.53
B. 6d=4.59
C. 6d+4.59=13.53
D. 6d=13.53
Write an algebraic EQUATION (=)

Which equation
represents the following
situation? Sam has 20
DVDs in his collection,
which is 5 times as
many DVDs as Richard
has. How many DVDs,
“d”, does Richard have?
A. 5d=20
B. 20-d=5
C. d/5=20
D. 5+d=20
Write an algebraic EQUATION (=)
 Which equation
represents the following
problem? Dean ate 11
cookies after dinner,
which was 3 more than
twice as many cookies as
Sara ate. How many
cookies, c, did Sara eat?
A. 2c+11=3
B. 2c-3=11
C. 2c-11=3
D. 2c+3=11