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Math Vocabulary

odd

- An odd number can not be divided into two equal

groups. You only need to check the last digit to

tell if a number is odd.

obtuse angle

- An obtuse angle measures more than 90 degrees.

Acute angle

- An acute angle measures less than 90 degrees.

Probability

- Probability is the likelihood or chance that

something will happen.

area

- The area is the number of square units needed to

cover the surface of the figure.

Quadrilateral

- A quadrilateral is a four-sided polygon with four

angles.

Parallel lines

- Two lines are parallel if they would never cross,

even if they went on forever.

Perimeter

- The perimeter is the distance around a figure.

6 cm

11 cm

Right angle

- A right angle measures exactly 90 degrees.

Perpendicular lines

- Two lines are perpendicular if they make two

right angles.

length

- The length is the long side of any object.

15 in

fact family

- A fact family has three numbers written four

ways. The top two are addition or

multiplication. The bottom two are either

subtraction or division.

2 3 5 3 2 5 5 - 3 2 5 -

2 3

even

- An even number can be divided into two equal

groups. You only need to check the last digit to

tell if a number is even.

Intersecting lines

- Two lines are intersecting if they would ever

cross.

sum

- The answer when adding two or more addends.

6 2 8

DIGITS

- The symbols 0,1,2,3,4,5,6,7,8,and 9, used to

write numbers.

Place Value

- The value of a place a digit has in a number.

Ones

Tens

Hundreds

150

Standard Form

- A number written in a way that shows only its

digits.

2,827

Expanded Form

- A number written as the sum of the values of its

digits.

2,476

2,000400706

line segment

- A line segment is a piece of a line with two ends.

Word Form

- A number written in words.

125

one hundred twenty-five

Line of Symmetry

- A line of symmetry is a line that divides a

figure into two congruent parts.

Open figure

- An open figure is a figure that does not begin

and end at he same point.

product

- The product is the answer you get when you

multiply. The product of six and two is twelve.

6 X 2 12

Closed Figure

- A closed figure is a figure that begins and ends

at the same point.

congruent

- Congruent shapes are the same size and shape, but

they can be translated, rotated or reflected.

Parallelogram

- A quadrilateral with opposite sides parallel.

Rhombus

- A parallelogram whose four sides are congruent

and whose opposite angles are congruent.

fraction

- A fraction tells how a number is divided. The

bottom tells how many total pieces make a whole.

The top tells how many we are counting.

Octagon

- An octagon is an eight-sided figure.

Parallel

- Two lines that never intersect

difference

- The difference is the answer you get when you

subtract. The difference of six and two is four.

6 - 2 4

numerator

- The numerator is the top number of a fraction.

The numerator tells how many we are counting.

Denominator

- The denominator is the bottom number of a

fraction. The denominator tells the total number

of pieces to make a whole.

Hexagon

- A hexagon is a 6 sided polygon.

Expanded Notation

- Expanded Notation is the way to write a number by

showing the value of each digit.

2,356 2000300506

Equation

- An equation is a number sentence with an answer.

2 9 11 16 3 19

quotient

- The quotient is the answer you get when you

divide. The quotient of six and two is three.

6 2 3

line

- A line goes on forever.

Equally Likely

- Equally Likely is when there are the same chances

for more than one event to happen

polygon

- A polygon has straight sides joined together.

The sides are line segments. They are joined at

vertices.

Estimate

- To estimate is to form an approximate judgment or

opinion regarding the worth, amount, size, weight

40

50

48

50

Multiples

- A multiple is two numbers that form a product

when multiplied

multiples of 4 4, 8, 12, 16, 20, 24, 28, 32

Math Vocabulary

Triangular Pyramid

- A triangular pyramid is a pyramid having a

triangular base.

Triangular Prism

- A triangular prism is a prism composed of two

triangular bases and three rectangular sides.

Sphere

- A sphere is a round object whose curved surface

is the same distance from the center to all its

points.

Rectangular Prism

- A rectangular prism is a 3 dimensional figure

with 6 rectangular faces.

Cube

- A cube is a solid figure with six congruent

square faces.

Cylinder

- A cylinder is a solid or hallow object that is

shaped like a can.

expression

- An expression is a number sentence without an

answer.

2 y 3 8 z

face

- The face is the flat side of a 3-d shape.

vertices

- Vertices are where two or more edges meet.

Reflect

- Reflect means flipping the image over the line.

(FLIP)

edges

- The edge is the place where two faces meet.

Symmetry

- When one half of a figure looks like the mirror

image of the other half.

Rotate

- Rotate means turning the image from a pivot point

to another. (TURN)

Translate

- Translate means moving the image horizontally or

vertically. (SLIDE)

Translation, Reflection, Rotation

- Translation is to translate, say it again
- To somebody else who didnt understand
- When I look in the mirror I can see my reflection
- Everything is flipped in the other direction
- Rotation is to rotate, make it turn
- These words are not so hard they are easy learn
- So reflection is to flip
- Rotation is to turn
- Translation is to slide it
- Ive got this concept learned!

Impossible

- Impossible is not possible. It is unable to be,

exist, or happen.

Certain

- To be certain you are free from doubt. You are

confident and sure of the outcome.

Possible Outcome

- Possible outcomes of an event are the results

which may occur from any event.

double

- A double is a number that has two as a factor.

All even numbers are doubles. You only need to

check the last digit to tell if a number is a

double.

capacity

- The capacity is the amount a container can hold

when it is filled.

weight

- The weight of an object is the amount or quantity

of heaviness or mass amount a thing weighs.

cone

- A cone is a solid, pointed figure that has a flat

round base.

foot

- A foot is about the length of a football. 3 feet

1 yard. 5,280 feet 1 mile.

yard

- 3 feet 1 yard. A yard is about the length of

a baseball bat. 36 inches 1 yard

inch

- An inch is about the length of a paper clip. 12

inches 1 foot. 36 inches 1 yard

freezing

- Freezing is 32 degrees Fahrenheit or 0 degrees

Celsius.

factor

- A factor tells which groups a number can be

broken into. Ten can be broken into 1 group of

10, 10 groups of 1, 2 groups of 5, or 5 groups of

2.

kilogram

- A kilogram weighs about as much as a baseball

bat. A kilogram is a little more than 2 pounds.

1,000 grams 1 kilogram

quart

- In the grocery store, a quart is the smaller size

of milk carton. 4 quarts 1 gallon 2 pints

1 quart

a gallon

boiling

- Water boils at 212 degrees Fahrenheit or 100

degrees Celsius.

inverse

- An inverse is the opposite operation in a fact

family. Addition and subtraction are inverses.

Multiplication and division are inverses.

gt inverse

6 7 13

13 - 7 13

Room temperature

- Room temperature is about 70 degrees Fahrenheit

or 20 degrees Celsius.

summer heat

- In the summer it gets up to 100 degrees

Fahrenheit or about 40 degrees Celsius.

cup

- A cup holds about as much as a school milk

carton. 2 cups 1 pint. 4 cups 1 quart

1 quart

1 pint

gram

- A gram weighs about as much as an M M. 1,000

grams 1 kilogram

gallon

- 4 quarts 1 gallon. A jug of milk is 1 gallon.

ounce

- An ounce weighs about as much as a spoonful of

peanut butter. 16 ounces 1 pound

thermometer

- A thermometer measures temperature in Fahrenheit

and Celsius.

ton

- A ton weighs about as much as a rhinoceros. 2,000

pounds 1 ton

liter

- 1,000 milliliters 1 liter. A liter is about

the size of a sports drink bottle.

pound

- A pound weighs about as much as a jar of peanut

butter. 16 ounces 1 pound. 2,000 pounds 1

ton

centimeter

- A centimeter is the size of a centimeter cube.

100 centimeters 1 meter.

mile

- 5,280 feet 1 mile. A mile is about as far as

you can walk quickly in 15 minutes.

milliliter

- A milliliter is about as much as a drop of water.

1,000 milliliters 1 liter

meter

- 100 centimeters 1 meter. A meter is about the

length of a baseball bat. 1,000 meters 1

kilometer.

triple

- A triple is a number that has three as a factor.

All multiples of three are triples. You only

need to check the digits for threes to tell if a

number is a triple.

point

- A point is one little place. On a map a point is

named with x and y.

pint

- A pint holds a little more than a can of soda. 2

cups 1 pint. 2 pints 1 quart