Math Vocabulary

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Math Vocabulary
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Algebra

• The area of mathematics where letters (like x
  or y) or other symbols are used to represent
  unknown numbers.Example in x - 5 2, x is
  unknown.

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4x 7y 11

• Expression - Numbers, symbols and operators (such
  as and ) grouped together that show the value
  of something.
• Expressions do not have equal signs.

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4x - 7y 11

• Term - In Algebra a term is either a single
  number or a variable, or numbers and variables
  multiplied together.
• Q1. List the terms from the example above?

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4x -7y 2x -11

• Like Terms two or more terms that have the same
  variables. They can be combined or simplified.
• Unlike Terms two or more terms that do NOT have
  the same variables. They cannot be simplified.
• Q2. What are the like terms above?

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4x - 7y 11

• Variable - A symbol for a number we don't know
  yet. It is usually a letter like x or
  y.Example in x 2 6, x is the variableIf
  it is not a variable it is called a Constant.
• Q3. How many different variables are in the above
  expression?

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4x - 7y 11

• Constant - In Algebra, a constant is a number on
  its own, or sometimes a letter such as a, b or c
  to stand for a fixed number. A fixed value.
• Example in x 5 9, 5 and 9 are constantsIf
  it is not a constant it is called a variable.

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4x - 7y 11

• Coefficient - A number used to multiply a
  variable.
• Example 4x means 4 times x (multiply me!), and
  x is a variable, so 4 is a coefficient.
• Q4. What is the coefficient of y in the above
  expression?

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4x - 7y 11

• Operator - a symbol (such as , , etc) that
  represents an operation (i.e. you want to do
  something with the values).
• Q5. Is the second term a negative 7 or minus 7?

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4x - 7 5

• Equation - An equation says that two things are
  the same, using mathematical symbols.An equal
  sign () is usedExample 72 10-1

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Why does this symbolize an equation?
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Describe the Variable Expression
Variable Expression Meaning Operation
8y, 8 y, (8)(y) 8 times y Multiplication
, 16 ? b 16 divided by b Division
4 s 4 plus s Addition
9 - x 9 minus x Subtraction
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Substitute and Solve
Solve these equations if n 4
3 4 7

• 3 n ?
• 5n 5 ?
• 20/n ?

5(4) 5 20 5 25
20/4 5
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Evaluate each expressiony 2
Expression Substitute Simplify
5y

y 6
14 - y
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