## Glossary of 4th Grade Math Vocabulary 2

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- a.m
- used to show time between midnight and noon

- Associative Property of Multiplication
- the way that factors are grouped does not change the product

- certain
- to be sure or definite

- cube
- a space figure with 6 congruent faces, 8 vertices, and 12 equal edges

- decimal number
- a number containing a decimal point

- difference
- the answer to a subtraction problem

- endpoint
- a point at the end of a line segment or ray

- face
- a flat surface on a space figure

- front-end digit
- the digit in the place with the greatest value

- hexagon
- a polygon with 6 sides and 6 vertices

- inverse operations
- 2 operations with the opposite effect like multiplication and division

- line graph
- a graph used to show how data changes over time

- median
- the middle number when numbers are arranged from least to greatest

- mirror image
- the reverse image of a figure

- numerator
- the top number in a fractio; how many equal parts are being considered

- ounce (oz)
- a customary unit of mass

- period
- a group of 3 digits in a number separated by a comma from the other digits

- plane figure
- any 2-dimensional figure

- product
- the answer to a multiplication problem

- quotient
- the answer to a division problem

- remainder
- the number that is left after dividing

- space figure
- a figure with 3 dimensions

- teaspoon (tsp)
- a customary unit of capacity

- trapezoid
- a quadrilateral with 1 pair of parallel sides and 1 pair of sides that are not parallel

- whole number
- any of the counting numbers 0, 1, 2, 3, 4, 5, 6, 7….

- acute angle
- an angle less than a right angle

- average
- the sum of addends divided by the number of addends

- circle
- a closed plane figure with all the points the same distance from center

- cup, c
- a customary unit of capacity

- decimal point
- a dot separating the ones and tenths places in a decimal number

- digit
- the symbols 0 to 9 used to write numbers

- equally likely
- outcomes having the same chance of happening

- fact family
- all related +/- or x/- facts that use the same numbers

- front-end estimation
- an estimation made using the front-end digit of a number

- hundredths
- the name of the second place after the decimal point

- kilogram (kg)
- a metric unit of mass

- line of symmetry
- a line on which a figure can be folded so that both halves are congruent

- meter
- a metric unit of length/distance

- mixed number
- a number written as a whole number and a fraction

- obtuse angle
- an angle greater than a right angle

- outcome
- a result of a probability experiment

- perpendicular
- 2 lines that intersect and form right angles

- plot
- using an ordered pair to locate a point on a grid

- Property of 1 for Division
- any number divided by 1 is that number

- range
- the difference between the greatest number and the least number in a set of numbers

- right angle
- an angle with the shape of a square corner

- sphere
- a three-dimesional figure with a curved surface that is shaped like a ball

- tenths
- the name of the first place after the decimal point

- turn (rotation)
- a transformation of a figure by turning it

- word form
- a number written in words

- addend
- a number that is added

- bar graph
- a graph that uses bars to compare data

- closed figure
- a plan figure that completely surrounds an area

- customary system
- a system of measurement used in the U.S.

- decimeter (dm)
- a metric unit of length

- dividend
- the number to be divided

- equivalent decimals
- 2 decimals that are equal

- factors
- numbers that are multiplied to give a product

- gallon (gal)
- a customary unit of capacity

- impossible
- cannot happen

- kilometer (km)
- a metric unit of length

- line segment
- a part of a line with 2 endpoints

- metric system
- a measurement system based on tens

- most likely
- outcomes that have a greater chance of happening

- octagon
- a polygon with 8 sides and 8 vertices

- p.m.
- used to show the time between noon and midnight

- pictograph
- a graph that uses pictures or symbols to show data

- point
- any exact location in space represented by a dot

- Property of 1 for Multiplication
- the product of any number and 1 is that number

- ratio
- a comparison of two numbers

- rotation
- a transformation of a figure by turning it about a fixed point

- sum
- the answer to an addition problem

- three-dimensional (3-D) figures
- space figures that have length width and height

- two-dimensional figures (2-D)
- plane figures that have length and width

- yard (yd)
- a customary unit of length

- angle
- the figure made by 2 rays that extend from a common endpoint

- capacity
- the amount a container can hold

- Commutative Property of Multiplication
- the order in which numbers are multiplied does not change the product

- cylinder
- a space figure with 2 circular faces that are parallel and congruent

- degree Celsius ( C)
- a metric unit used to measure temperature

- divisor
- the number by which a number is divided

- equivalent fractions
- 2 fractions that are equal

- fraction
- a number that names parts of a whole

- gram (g)
- a metric unit of mass

- improper fraction
- a fraction with a value greater than 1, the numerator is greater than or equal to the demonimator

- least likely
- outcomes that have a smaller chance of happening

- liter (L)
- a metric unit of capacity

- milliliter (mL)
- a metric unit of capacity

- multiple
- the product of a whole number and any other whole number

- open figure
- a plane figure that does not completely enclose an area

- parallel
- lines that are the same distance apart and do not intersect

- pint (pt)
- a customary unit of capacity

- polygon
- a closed plane figure made with line segments

- pyramid
- a space figure whose base is a polygon, and other faces are triangles that meet at a vertex

- ray
- a part of a line that has 1 endpoint and goes on and on in one direction

- round
- to estimate a number to the nearest ten, hundred, or thousand

- square pyramid
- a space figure with a square base and 4 faces that are triangles and meet in a vertex.

- ton (t)
- a customary unit of weight

- Venn diagram
- a diagram that uses intersecting circles to compare groups of objects

- Zero Property of Division
- 0 divided by any number except 0 is 0. A number cannot be divided by zero.

- area
- the measure, in square units, of the inside of a plane figure

- centimeter (cm)
- a metric unit of length

- cone
- a space figure with 1 curved surface, 1 flat face, 1 curved edge, and 1 vertex

- data
- a collection of facts gathered by observation, questioning, or measuring

- degree ( F)
- a customary unit used to measure temperature

- edge
- the line where 2 faces of a space figure meet

- estimate
- an approximate rather than an exact answer

- flip (reflection)
- a transformation that results in a mirror image of a figure

- graph
- a drawing used to record information

- inch (in.)
- a customary unit of length

- less than (<)
- the symbol used to compare 2 numbers when the smaller number is on the left

- mass
- the weight of an object; the amount of matter in an object

- millimeter (mm)
- a metric unit of length

- number line
- a line on which points correspond to numbers

- ordered pair
- a pair of numbers used to name a location on a grid

- pentagon
- a polygon with 5 sides and 5 vertices

- place value
- the value determined by the position of a digit in a number

- pound (lb)
- a customary unit of mass

- quadrilateral
- a 4-sided polygon

- rectangular prism
- a space figure with 6 rectangular faces, 8 vertices, and 12 edges

- side
- a line segment that is part of a plane figure

- standard form
- a number written with one digit for each place value

- transformation
- an operation on a geometric figure by which another image is created

- vertex/vertices
- the point or points where 2 or more line segments meet; the "corner"

- Zero Property of Multiplication
- the product of any number and 0 is 0.

- array
- an arrangement of objects in rows and columns

- century
- 100 years

- congruent
- figures that have the same size and shape

- decade
- 10 years

- denominator
- the bottom number in a fraction; the number of equal parts

- elapsed time
- the amount of time between 2 given times

- expanded form
- a way to write numbers that shows the value of each digit

- foot (ft)
- a customary unit of length

- greater than (>)
- the symbol used to compare 2 numbers when the larger one is on the left

- intersecting lines
- lines that cross at one point

- line
- a straight path that goes on and on in 2 directions with no endpoints

- mean
- the average of a set of numbers

- mode
- the number that appears most often in a set of numbers

- number sentence
- an equation or inequality written with numbers and symbols

- ordinal number
- a number telling the position of something

- perimeter
- the distance around a figure

- plane
- a flat surface that goes on and on in all directions

- probability
- the chance of something happening

- quart (qt)
- a customary unit of capacity

- reflection
- a transformation that results in a mirror image

- slide (translation)
- a transformation that moves a figure by slidings each of the points the same distance and direction

- tablespoon (tbsp)
- a customary unit of capacity

- translation
- a transformation that moves a figure by slidings each of the points the same distance and direction

- volume
- the number of cubic units that fit inside a space figure