1. Unit 3 Vocabulary EXPRESSIONS

2. Algebraic Expression

3. Arithmetic Expression  An expression that represents a numeric value.  Example: 3 + 5 = 8

4. Associative Property  Associative property of addition (a + b) + c = a + (b + c) Associative property of multiplication (a × b) × c = a × (b × c)

5. Base  (of a power): The factor being multiplied by itself. Base → 3 ⁴

6. Coefficient  The number part of a term that includes a variable.

7. Commutative Property  Commutative property of addition: a + b = b + a Commutative property of multiplication :a × b = b × a

8. Evaluate  To find the value of an expression by replacing each variable in an expression with numbers.

9. Evaluate an Algebraic Expression  To find the value of an expression by replacing each variable in an expression with numbers.

10. Exponent  The number of times a number or expression (called base) is used as a factor of repeated multiplication. Also called the power.

11. Expression

12. Like Terms  Terms that have identical variable parts. Two or more constant terms are also considered like terms.

13. Numerical Expression  An expression that contains only numbers and operations and that represents a particular value.

14. Power  A number that can be expressed using an exponent.

15. Ratio  A comparison of two quantities that have the same unit of measure.

16. Substitute  To replace one element of a mathematical equation or expression with another.

17. Term  A number, a variable, or a product of numbers and variables.  Examples: 5e, m, 8x, 3ab, and -9r 2 s are all terms

18. Tangram  An ancient Chinese square puzzle consisting of seven pieces that can be rearranged to make various shapes.

19. Table  A means of organizing data in rows and columns for a particular purpose.

20. A letter or symbol used to represent a number or quantities that vary Variable