square

A rectangle whose sides are all the

same length.

square array

A rectangular array with the

same number of rows as columns.

square number

A number that is the product of a whole

number multiplied by itself; a whole number to the second power.

1

4

9

16

35 = 35 x 35 = 1225 2

square of a number

The product of number and

itself.

square pyramid

A pyramid with a

square base.

square root of a number

The square root of a number n is a number which, when multiplied by itself, results in the

number n.

320= 2*2*2*2*2*2*5 320= 4*4*4*5 or

320=16*4*5 √320=8√5

square units

The units used to measure

area.

7 square units

standard notation

The most familiar way of representing whole

numbers, integers, and decimals by writing

digits in specified place.

587 = 500 + 60 + 7

expanded notation

standard notation

standard unit

A uniform unit of

measure.

step graph

A graph that looks like

steps.

stem-and-leaf plot

A display of data in which digits with larger place values are named

as stems, and digits with smaller place

values are names as leaves.

straightedge

A tool used to draw a

line segment.

subtraction

A math operation based on taking

away one quantity from another or

decreasing quantity.

7- 3

4

minuend

subtrahend

difference

subtrahend

The number being subtracted.

7- 3

4

minuend

subtrahend

difference

sum

The answer to an adding problem.

addends

14 + 15 + 6 = 35

sum

supplementary angels

Two angels whose measures total 180 .o

survey

Collection data for graphing

and analysis.

symmetry

The property of exact balance in a figure; having the

same size and shape across a dividing

line.

symmetry

The matching of two halves of a shape.

tally marks

Marks used to keep

track of a count.

5 10 11

tally chart

Tally charts are used to organize and

display data. A tally chart is a table that

shows how many times each value appears.

tangent

Intersecting at exactly one

point.

template

A pattern used as a guide in making

something accurately.

tens

The place-value position equal to

ten times the unit value.

59270

term

In an algebraic expression or

equation, a number or a product of a number

and one or more variables.

terminating

decimal

Decimals that continue a

pattern without end.

.333… 1 3

= .30

tessellation

An arrangement of closed shapes that covers a surface

completely without overlaps or gaps.

tetrahedron

A polyhedron with four

faces.

theorem

A mathematical statement that can be proven to be true (or

sometimes, a statement that is proposed and needs to be proven).

3-dimensional

(3-D)

Objects with thickness,lengt

h and width.

3-dimensional

(3-D)

Objects that are not completely

within a single flat surface.

tile

A shape used in a tessellation. If only

one shape is repeated in a tessellation, the tessellation is called

a same-tile tessellation.

tiling

An arrangement of closed shapes that covers a surface

completely without overlaps or gaps.

time line

A number line showing years,

days,and events in a sequence.

tool kit

A bag containing

things needed in math.

top-heavy fraction

A fraction that names a number greater than or

equal to 1; a fraction whose numerator is

equal to or greater than its denominator.

trade-first subtractio

n

Subtraction procedure in which all necessary

trades are done before any

subtractions are carried out.

trapezoid

A quadrilateral that has one pair of

parallel sides. No two sides need to

be the same length.

translation

The motion of “sliding” an object or picture along a

straight line.

transparent mirror

A mirror with a front and back face that has a

recessed edge used for drawing lines of

symmetry.

triangle

A 3-sided polygon.

triangular prism

A prism whose bases

are triangles.

triangular

pyramid

A pyramid whose bases (faces) are triangles.

trillion

A digit(s) followed by 12 whole-number places.

One trillion written

in number form is

1,000,000,000,000

in exponential form

1012

triple

Three times an amount.

turn

Rotation.

turn-around facts

A pair of add or multiplication facts in which the order of the addends or

the factors is reversed.

6 + 33 + 6

143 + 2323 + 143

2 x 33 x 2

234 x 55 x 234

twin primes

Two prime numbers that are separated

by just one composite number.

3 and 5 are twin primes, because they are separated by the composite number 4.

2-dimensional

(2-D)

Objects completely within a flat surface; objects with length and width, but no

thickness.

unit

A label, descriptive word, or unit of measure

used to put a number in context.

24 children27 ducks

30 cents

3 o’clock

1 kg

unit

ONE of something,

unit box

A box displayed alongside a set of

numbers or problems.

UnitUnit

Unit

Unit

Unit

cents

dogs

days

inches

bats

unit fraction

A fraction that names one of the equal parts

of the whole. The numerator is always 1.

unit marks

The equidistant makes that represent

numbers on thermometers, rulers,

and other scales of measurement.

U.S. customary

system

The standard measuring

system used in the United

States.

Distanceinchfootyardmile

Capacitycuppint

quartgallon

Weightouncepound

TemperatureFahrenheit

variable

A letter other symbol that represents a

number. A variable need not represent

one specific number; it can stand for many

different values.

vertex (vertices)

The point at which the rays or line segments of an angle, sides of a polygon, or the ends

of a polyhedron meet.

vertical angles

Two intersecting lines form four

angles. Two angles with the same vertex,

but no sides in common.

volume

The measure of the amount of space a 3-dimensional shape

takes up.

weight

A measure of how heavy

something is.

“What’s My

Rule?”

A routine that involves a set of number pairs in with the numbers in each pair are related to each other

according to the same rule.

whole

The entire object, collection of objects,

or quantity being considered; the ONE,

the unit, 100%.

whole number

Any of the numbers.

Whole number

Any of the numbers.

1, 2, 3, 4, …

width of a rectangle

Length of one side of a rectangle or

rectangular object; often the shorter

side.

X-by-y array

An arrangement having x rows of y per

row, representing x set of y objects in

each set.

2-by-6 arrays: 2 rows, 6 per row

Array of Dots Array of squares

yard (yd)

Standard unit of length equal to 3 feet or 36

inches.

1 2 3

zero facts

The sum of two 1-digit numbers where one of the addends is zero. The product of two 1 digit numbers. The produce is always

0.

0 + 5 = 5 4 x 0 = 0

8 + 0 = 8 0 x 8 = 0

0 + 6 = 6 7 x 0 = 0

zone

A group of locations, usually determined

by distances, for which a uniform rate

is charged by a delivery or

transportation system.