1. MCAS Vocabulary

2. Commutative Property The property that states if the order of
addends or factors is changed the sum
or product stays the same.
Example: =
7 x 3 x 4 = 3 x 4 x 7

3. Associative Property
The property that states the way addends are grouped or factors are grouped doesn’t change the product or sum. Example: (5+7) + 3 = (3+7) + 5 (7x7) x 3= (3x7) x 7

4. Distributive Property
The property that states multiplying a sum by
a number is the same as multiplying each
addend by the number and then adding the
product.
Example:
14 x 21 = 14 x (20 + 1) = (14 x 20) + (14 x 1)

5. Identity Property
Identity Property of Addition: The property that states that the sum of zero and any number is that number.
Example: = or = 39
Identity Property of Multiplication: The property that states the product of any number and 1 is that number.
Example: 12 x 1 = 12 or 50 x 1 = 50

6. Numerator

7. Denominator
A part of a fraction that tells how many equal parts are in a whole. Example: the 4 is the denominator.

8. Simplest Form
The form in which the numerator and denominator of a fraction have no other common factors besides 1. Example: ¾ and ½

9. Simplify
Combining like terms in an algebraic expression or PUTTING A FRACTION IN ITS LOWEST TERMS. Example: 14/28 = ½ Example: 4x + 3x + 7 = 7x + 7

10. Compatible Numbers Numbers that divide without a remainder,
are close to the actual numbers, and are easy
to compute with mentally.
Example: 27 ÷ 9 =3
When estimating: 348 ÷ 9 = 360 ÷ 9 = 40

11. Mean

12. The middle value in a group of numbers
Median
The middle value in a group of numbers
arranged in order.
Example: 1, 7, 8, 4, 3, 2, 5 =
1, 2, 3, 4, 5, 7,8, =
median = 4

13. Mode
The number or item that occurs the most often in a set of numbers. Example: 7, 3, 5, 6, 2, 1, 5 The mode = 5

14. The difference between the greatest and least
Range
The difference between the greatest and least
numbers in a group.
Example: 23, 4, 7, 18, 9 23
So, 19 is the range of these numbers.

15. Prime
A whole number greater than 1 whose only factors are 1 and itself. Example: 3, 5, 7

16. Composite
A whole number greater than 1 that has more than two whole-number factors. Example: 4, 6, 8, 9

17. Expression
A mathematical phrase that combines operations, numerals, and/or variables to name a number. Examples: 7 x a 6 x 2 x b (3x3) – n

18. A statement showing that two quantities are equal.
Equation
A statement showing that two quantities are equal.
Example:
n + 7 = 15

19. Quotient

20. Dividend