Writing Expressions and Equations
Key Vocabulary
Expression – a math sentence without
equal signs
Equation – a math sentence with equal signs
Variable – a letter that is used to represent a
number
Terms – the part of an expression that is
being added together
Key Vocabulary
Coefficient – the number part of the term that
has a variable with it
Constant Term – a term that has a number
but no variable
Like Terms – terms that have identical
variables
Inverse Operation – the opposite operation
used to solve an equation
Expressions vs Equations
Expressions – written as phrases
Example – the sum of six and a number
x+6
Equations – written as sentences
Example – the sum of six and a number IS ten
x + 6 = 10
A-HA Words
Add
Subtract
Multiply
Divide
Plus
Minus
Times
Divided by
The sum of
The
difference
of
The
product of
The
quotient of
Increased
by
Decreased
by
of
Translating Verbal Phrases
A.
A number increased by 5
B.
7 less than a number
C.
3 more than twice a number
D.
4 decreased by the quotient of a number and 7
Translating Verbal Sentences
A.
16 increased by a number is 27
B.
The difference of twice a number and 3 equals -4
C.
The product of ½ and a number is 36
D.
-3 is equal to twice the sum of a number and 2