A number divisible by 2.

Numbers ending in 0, 2, 4, 6, or 8.

even number

A number NOT divisible by 2.

Numbers ending in 1, 3, 5, 7, 9.

odd number

When three or more numbers are multiplied, the product is the same regardless of the

grouping of the factors. 

(2 x 3) x 4 = 24

2 x (3 x 4) = 24(2 x 4) x 3 = 24

associative property of multiplication

also called the Grouping Property

The numbers added together to form a sum.

  7 + 8 = 15

addend

sum

The numbers that are multiplied in a multiplication problem.

 

3 x 5 = 15

factors

product

sumthe answer to an addition problem

 

differencethe answer to a subtraction problem

 

productthe answer to a multiplication

problem 

quotientthe answer to a division problem

The property that states that changing the order of the factors

does not affect the product.

Example:

3 x 5 = 15 and 5 x 3 = 15

commutative property

of multiplication

A straight path that extends in both directions without end; marked with an arrowhead at

each end.

line  

A piece of a line that has two endpoints.

line segment

Two (or more) lines that run the same distance apart at every point

and will never intersect.

parallel lines

A line with one end point that extends non-stop in the

opposite direction.

ray

A shape formed by two rays that share an endpoint.

angle

The point where:• two or more rays share an endpoint.• the edges of a solid figure meet.

The point at the top of a cone.

vertexplural: vertices

Two or more lines that meet or cross at a point.

intersecting lines

Two lines that intersect and form right angles.

perpendicular lines

protractorTool used to

measure angles.

90°

90°90°

360°

90°

90°

90°

90°

180°

270°

90°

· A full circle rotation is equal to 360° (degrees)

·When divided into four equal sections, each section is worth 90°

1 rotation = 90°

2 rotations =

180°

3 rotations = 270°

4 rotations = 360°

An angle measuring 90 degrees.

right angle

An angle that measures LESS than 90 degrees.

acute angle

An angle that measuresMORE than 90 degrees.

obtuse angle

straight angleAn angle that measures

180 degrees.

four criteria for a

polygon

A polygon  

is made up of all straight line segments

is closed (has no breaks in the line

segments)

is 2-dimensitional

has no lines that cross over each other

A polygon with all equal sides and all equal angles.

regular polygon

A polygon that does NOT have all equal sides and

equal angles.

irregular polygon

four criteria of a

rectangle

A rectangle: 

is a quadrilateral. is made up of four line segments. has four 90° angles. is a parallelogram – a four sided

polygon with two pairs of parallel sides.

A quadrilateral (four sided polygon) with two pairs of

parallel sides.

parallelogram

A quadrilateral (four sided polygon) with one pair of parallel sides.

trapezoid

• Figures that have the same size AND same shape.

• The figures do not have be in the same position. •If you placed the two shapes directly on top of each other they would match up perfectly.

congruent

Figures that have the same shape, but are not the same size.

similar

The line that divides a figure in half so that both halves are exactly

the same.

line of symmetry

A triangle with all three sides of equal length.

equilateral triangle

3 in.

3 in.3 in.

A triangle with two sides that are equal and one that is not.

isosceles triangle

3 in.

5 in. 5 in.

A triangle with all sides that are a different length.

scalene triangle

8 in.

9 in.

4 in.

A triangle with at least one right angle.

right triangle

triangleA polygon with 3 sides.

quadrilateralA polygon with 4 sides.

quadrilateralA polygon with 4 sides.

parallelogramstrapezoidsrhombus

A quadrilateral with two pairs of parallel sides and four equal sides.

rhombus

pentagonA polygon with 5 sides.

A polygon with 6 sides.

hexagon

A polygon with 8 sides.

octagon

A polygon with 10 sides.decagon

obtuse triangleA triangle having an obtuse angle. One of the angles of the triangle measures more than 90 degrees.

acute triangleA triangle having three acute angles.

Which months have 30 days?

AprilJune

SeptemberNovember

Which months have 31 days?

JanuaryMarchMayJuly

AugustOctober

December

The number of square unitsthat can fit inside of a shape.

To find the _______ , count

the square units.

area

area = 9 square units

perimeterThe distance around the outside

of a shape. 

To find the __________ , add the length of all the sides.

2 cm + 3 cm + 3 cm = 8 cm

The perimeter of this figure is 8 centimeters.

bar graph

A flat surface of a solid shape.face

The line where two surfaces of a 3-dimensional shape

meet.

edge

 

A corner where two or more straight lines meet on a 3-dimenstional shape.

vertexvertices (plural)

vertex

The number below the bar in a fraction.  

It tells the total number of equal parts or groups into which the

whole or group has been divided.

denominator

The number above the bar in a fraction.  

It tells how many of the equal parts of the whole or group are being

considered.

numerator

The volume of this figure is 24 cubic units.

The amount of space a solid figure takes up. 

Volume = Length x Width x HeightV = L x W x H

volume

square pyramid

A 3-dimensional solid with a base that is a square and four faces that are triangles.

The metric unit for

measuring temperature.

Celsius

Fahrenheit

Customary or standard unit for measuring temperature.

standard form

2,394

A way to write numbers by using the digits 0-9.

expanded form 

241 = 200 + 40 + 1

word form

A way to write numbers by using words.

two-hundred fifty-seven

Used on a pictograph to tell how many each picture stands for.

key

line plot

line graphA graph that uses a line to show how

something changes over time.

mixed numberNumber represented by a

whole number and a fraction.

3 58

 fraction greater than one

A fraction in which the numerator is larger than

the denominator.

53

A solid figure with six faces that are rectangles.

rectangular prism

1,000 grams = 1 kilogram

gram and kilogramA metric unit for measuring mass.

The prefix kilo- is equal to

1,000kilometer = 1,000 meterskilogram = 1,000 grams

centi-The prefix is equal to

100century = 100 years

100 centimeters = 1 meter

liter and milliliter 

Metric units for measuring capacity.

1,000 milliliters = 1 liter

The prefix milli-

is equal to

1,000

10 centimeters = 1 decimeter

A decimeter (dm) is about the width of an adult's hand.

decimeter 

A metric unit for measuring length.

ante meridiem 

a.m.The time of day starting at midnight

and ending at noon.  

In Latin, ante meridiem means “before the midday.”

post meridiemp.m.

 

The time of day starting at noon and ending at midnight.

In Latin, post meridiem means

“after midday.”

analog clock

digital clock

colon

:The symbol used to separate the hour

from the minutes on a digital clock.

A model of multiplication that arranges objects in

rows and columns.

array

The amount a container can hold.

capacity

Customar

y

cups

pints

quarts

gallons

The amount a container can hold.

capacity

Metric

milliliters

liters

kiloliters

Freezing Point of Water

32 degrees Fahrenheit

0 degrees Celsius

Boiling Point of Water 212 degrees Fahrenheit

100 degrees Celsius

Normal Body Temperature

98.6 degrees Fahrenheit

37 degrees Celsius

temperature

, , ●hundred millions

ten millions

millions

hundred thousands

ten thousands

thousands

hundreds

tens

ones

tenths

hundredths

thousandths

 decimals

Place Value Chart

Example: 634,822

•Standard Form: 634,822

•Word Form: six hundred thirty-four thousand, eight hundred twenty-two

•Expanded Form: 600,000 + 30,000 + 4,000 + 800 + 20 + 2 = 634,822

•What is the value of the underlined digit in the number 634,822 = 600,000

•What place value does the underlined digit hold? = hundred thousands

Distributive Property of Multiplication

The property that states that multiplying a sum by a number is the same as multiplying each addend by

the number and then adding the products.

break down the 8 into 5 + 3

7 x 8

5 + 3

(7 x 5) + (7 x 3)

35 + 21 = 56

break down the 16 into 10 + 6

5 x 16

10 + 6

(5 x 10) + (5 x 6)

50 + 30 = 80

Identity Property of Multiplication

The property that states that the product

of any number and 1 is that number.

Examples:

5 × 1 = 5

248 x 1 = 248

1 × 8 = 8

cubeA three-dimensional shape

with six congruent square faces.

A three-dimensional, pointed shape that has a flat, round base.

cone

cylinder3-dimensional object shaped like a can

dataAnother word for information.

Information collected about people or things and can be represented in graph form.

diagonal

A line segment that connects two vertices of a polygon that are not next to each other.

Opposite operations. Operations that undo and check one another.

 

addition and subtraction are inverse operations

 

multiplication and division are inverse operations.

inverse operations