Vocabulary

A

Addend Any of the numbers that are added together.

B

C

Commutative Property The Law that says you can swap numbers around and still get the same answer when you add. Or when you multiply.

D

Denominator the bottom number in a fraction that shows the number of equal parts an item is divided into. It is the divisor of a fraction.

Dividend in a division problem, the original number. For example, in the expression 4 ÷ 2, 4 is the divisor

Divisor in a division problem, the number another is divided BY. For example, in the expression 4 ÷ 2, 2 is the divisor (pro tip: a divisor is also a factor!)

E

Equation a statement that two things are equal: "this equals that". An equation has an equal sign

ex. 2 + 1 = 3

Equations are made from expressions, but they contain both the question and the answer.

Equivalent Fraction Fractions which have the same value, even though they may look different. Example 1/2 and 2/4 are equivalent, because they are both "half"

Equivalent Ratio Because ratios are fractions, ratios which have the same value, even though they may look different, are called equivalent ratios. Example 1:2 and 128:256 are equivalent.

Expression Numbers, symbols and operators (such as + and ×) grouped together that show the value of something. Another way of looking at it is that the expression, for example 2 + 1, asks a question

F

Factor a number or quantity that when multiplied with another produces a given number or expression

Fraction How many parts of a whole: the top number (the numerator) says how many parts we have, and the bottom number (the denominator) says how many equal parts the whole is divided into

G

H

I

J

K

L

Like the same as, matching (see "common"). Ex like terms

M

Multiple Product of a number and a non-zero whole number

N

O

P

Perfect Number A whole number that is equal to the sum of its positive factors (except the number itself). An example of a perfect number is 28. The ancient Greeks loved perfect numbers. Go figure.

Personal Finance Your own money: how you earn it, manage it, and hopefully make it grow. Includes what you spend (your budget), your assets, savings and any debts.

Q

Quotient The answer after we divide one number by another. For example, in the equation 12 ÷ 3 = 4, 4 is the quotient.

R

Relatively Prime any two whole numbers that do not have any common factors

S

T

U

Unlike different

V

W

Whole All of something. Complete.

Whole Number Any of the numbers {0, 1, 2, 3, ...} etc. There is no fractional or decimal part. And no negatives.

X

Xara a student in House S with a cool first name. oh yeah, and she also has a bird.

Y

Z