Math 7-8 Vocabulary

Front 1

natural #s

Back 1

{1, 2, 3 ...} counting #s

Front 2

whole

Back 2

natural #s and 0

Front 3

integers

Back 3

whole #s & their opposites
{....-3,-2,-1,0,1,2,3.....}

Front 4

rational

Back 4

any # that can be written in form of fraction

Front 5

irrational

Back 5

any # that can NOT be written in form of fraction

Front 6

real

Back 6

all irrational and rational #s

Front 7

What is the formula for area of a rectangle?

Back 7

A = L * W

Front 8

What is the formula for area of a triangle?

Back 8

A = 1/2 B * H

Front 9

Congruent

Back 9

All sides and angles are the same - same size, same shape

Front 10

Order of Operations

Back 10

PEMDAS - Parentheses, Exponents, Multiplication, Division, Addition, Subtraction

Front 11

proportion

Back 11

equation that states 2 ratios (fractions) are equal
example 1/2=50/100

Front 12

expanded form

Back 12

2,495 = 2,000 + 400 + 90 + 5

Front 13

mixed numbers

Back 13

A number that consists of a whole number part and a fractional part.
Example: 1 1/3

Front 14

digits

Back 14

any one of the following ten numerical symbols: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9.

Front 15

origin

Back 15

(0,0)

Front 16

x-axis

Back 16

horizontal number line

Front 17

y-axis

Back 17

vertical number line

Front 18

ordered pair

Back 18

(x,y)

Front 19

terminating decimal

Back 19

A decimal with a finite number of digits.

Front 20

repeating decimal

Back 20

A decimal in which a digit or a set of digits repeat infinitely.

Front 21

range

Back 21

In statistics, the difference between the largest and smallest values in a sample.

Front 22

prime number

Back 22

A whole number greater than 1 whose only factors are 1 and itself.

Front 23

composite number

Back 23

A number exactly divisible by at least one whole number other than itself and 1.

Front 24

similarity

Back 24

Having the same shape, but not necessarily the same size.

Front 25

mode

Back 25

The number of element that occurs most frequently in a set of data.

Front 26

median

Back 26

The middle number in an ordered set of numbers.

Front 27

What is the formula for area of a circle?

Back 27

"Pi r squared"

Front 28

What is the formula for circumference of a circle?

Back 28

Pi x D

Front 29

Complementary angles

Back 29

Add up to 90 degrees

Front 30

supplementary angles

Back 30

Add up to 180 degrees

Front 31

probability

Back 31

the number of chances
divided by
the number of choices

Front 32

what are the factors of 15

Back 32

1, 3, 5

Front 33

what are the multiples of 6

Back 33

6, 12, 18, 24...