VARIABLES
&
EXPRESSIONS
1-1
VOCABULARY
• Variable – a letter that stands for a
number
• Variable Expression – mathematical
phrase that uses variables,
numerals, and operational
symbols
• Numerical Expression – mathematical
phrase that uses numbers and
operational symbols only
Examples…
Identify as a Numerical or
Variable Expression
50 – 5
c–5
4t
7x3
8÷x
d + 43 – 9
Numerical
Variable
Variable
Numerical
Variable
Variable
Mathematical Operations
ADD
SUBTRACT MULTIPLY
DIVIDE
Total
Difference
Product
Quotient
More than
Fewer than
Times
Divided by
Increased
by
Less than
• , ( ), x
÷, ---, /
Decreased by
+
-
Examples
Translate from word sentences to number
sentences.
1.) m divided by 6 m/6
K–9
2.) 9 less than k
Create problems based on what is written.
1.) The value in cents of 5 quarters 5(25)
2.) The number of months in y years Y(12)