1. Algebra Vocabulary

2. Coefficient A coefficient is the numerical factor in a term.
Example: in the term 4x, 4 is the coefficient.
If the coefficient is not written, it is 1
Example: in the term d, 1 is the coefficient.

3. 1. Circle the coefficient
3x 4y 5a 7b a 1

4. Variable
A variable is a symbol (placeholder) used to represent an unknown number.
Example: in the term 4x, x is the variable

5. 2. Circle the variable
3x 4y 5a 7b a

6. Term
A term is a number, variable, product or quotient in an expression of sums and/or differences. Terms are separated with a + or – sign.
Examples:
w 5 3w y/8

7. How many terms are there?
7x2 + 5x - 3
There are 3 terms!

8. 3. Indicate the number of terms in each expression
y/2 + 3 – 7 _____
4d – 6 _____ 2 1 2 1 3 2

9. Inverse Operations Addition and _____________ are inverse operations
Inverse operations are operations which undo each other.
4. Examples:
Addition and _____________ are inverse operations
Multiplication and _________ are inverse operations
Subtraction
Division

10. Expressions
An expression can be a term or a collection of terms separated by addition or subtraction signs.
Expressions do not include an equal sign!
Examples : 2x + 1 3y

11. Equations
An equation is a mathematical sentence stating that two expressions are equal.
Example:
2x + 1 = 4
The expressions are equal to one another.

12. 5. Expression or Equation?
4d – 6
3x = 6 3b
a/6
y/2 + 3 = 7
Expression
Equation
Expression
Expression
Equation