Fourth Grade Flash Cards

Front 1

Whole Numbers

Back 1

zero and the counting numbers: 1,2,3,4,5,6 and so on

Front 2

Inequality

Back 2

a mathermatical sentence that compares two unequal expressions using symbols - less than, greater than, not equal

Front 3

Place Value

Back 3

the value of a digit based on its position in a number

Front 4

Expanded Form

Back 4

a number written as the sum of the value of it digits
4,000 + 300 + 90 + 2

Front 5

Digit

Back 5

any of the ten symbols
0,1,2,3,4,5,6,7,8,9

Front 6

Rounding

Back 6

expressing a number to the nearest ten, hundred, and thousand

Front 7

Period

Back 7

a group of 3 digits separated from tother digits of a number by a comma
ones, thousands, millions, billions

Front 8

Word Form

Back 8

a number written as words
four thousand, three hundred ninety-two

Front 9

Standard Form

Back 9

a number written with one digit for each place value
4,392

Front 10

Equation

Back 10

a number sentence with an equal sign; the amount on one side of the equal sign has the same value as the amount on the other side

Front 11

Compatible Numbers

Back 11

numbers that are easy to work with mentally

Front 12

Decompose

Back 12

breaking apart numbers into smaller parts

Front 13

Estimate

Back 13

an approximate rather than an exact answer

Front 14

Sum/Difference

Back 14

the answers in addition and subtraction

Front 15

Regroup

Back 15

to use 1 ten to form 10 ones; 1 hundred to form 10 tens; 1 thousand to form 10 hundreds

Front 16

Product

Back 16

the answer to a multiplication problem

Front 17

Factors

Back 17

the numbers that are multiplied to give a product

Front 18

Array

Back 18

an arrangement of objects or numbers in rows and columns

Front 19

Multiple

Back 19

the product of a whole number and any other whole number

Front 20

Clustering

Back 20

using numbers that are close to a rounded number to make estimation easier

Front 21

Quotient

Back 21

the answer to a division problem

Front 22

Remainder

Back 22

the number that is left after dividing

Front 23

Multiplication

Back 23

the operation (x) of two or more numbers, called factors, to find a product

Front 24

Division

Back 24

the operation of making equal groups

Front 25

Dividend

Back 25

the number to be divided

Front 26

Divisor

Back 26

a number by which another number is divided

Front 27

Divisible

Back 27

capable of being divided without a remainder

Front 28

Prime Number

Back 28

a number that has exactly two different factors, itself and 1

Front 29

Composite Number

Back 29

a number that has more than two factors

Front 30

Improper Fraction

Back 30

a fraction in which the numerator is greater than or equal to the denominator; its value is greater than or equal to 1

Front 31

Equivalent Fractions

Back 31

fraction that have different numerators and denominators but name the same numbers

Front 32

Proper Fractions

Back 32

a fraction whose numerator is smaller than its denominator

Front 33

Mixed Decimal

Back 33

a whole number and a decimal

Front 34

Numerator

Back 34

the number that tells how many equal parts are described by the fraction

Front 35

Unit Fraction

Back 35

the name of each equal part; it has one as the numerator

Front 36

Mixed Number

Back 36

a number written as a whole number and a fraction

Front 37

Equivalent Decimals

Back 37

decimals that name the same number

Front 38

Whole Number

Back 38

any of the numbers 0, 1, 2, 3, and so on

Front 39

Outcome

Back 39

the result of a probability experiment

Front 40

Double Bar Graph

Back 40

a graph in which data is compared by means of pairs of rectangular bars drawn next to each other

Front 41

Probability

Back 41

the chance that an event will occur

Front 42

Scale

Back 42

a system of marks at fixed intervals used in measurment and graphing

Front 43

Data

Back 43

information that is gathered

Front 44

Bar Graph

Back 44

a graph with bars of different lengths to show information

Front 45

Tree Diagram

Back 45

a diagram that shows combinations of outcomes of an event

Front 46

Sample

Back 46

a number of people, objects, or events chosen from a given population to represent the entire group

Front 47

Elapsed Time

Back 47

the amount of time that has passed

Front 48

Unit

Back 48

a precisely fixed quantity used to measure

Front 49

Perimeter

Back 49

the distance around a figure

Front 50

A.M.

Back 50

used to show time between midnight and noon

Front 51

P.M.

Back 51

used to show the time between noon and midnight

Front 52

Acute Angle

Back 52

an angle with a measure of less than 90 degrees

Front 53

Right Angle

Back 53

an angle with a measure of exactly 90 degrees

Front 54

Obtuse Angle

Back 54

an angle with a measure that is greater than 90 degrees

Front 55

Parallel Lines

Back 55

lines that are the same distance apart at all points. These lines will never intersect.

Front 56

Perpendicular Lines

Back 56

lines that intersect to form right angles

Front 57

Intersecting Lines

Back 57

lines that meet or cross at a point

Front 58

Point

Back 58

an exact location in space

Front 59

Line

Back 59

an endless collection of points along a straight path that goes on forever

Front 60

Line Segment

Back 60

part of a line that has 2 endpoints

Front 61

Line of Symmetry

Back 61

a line that divides a figure into two congruent halves that are mirror images of each other

Front 62

Plane Figure

Back 62

any 2-dimensional figure such as circles and polygons

Front 63

Space/Solid Figure

Back 63

a geometric figure with 3 dimensions

Front 64

Geometry

Back 64

the mathematics of the properties and relationships of points, lines, angles, surfaces, and solids

Front 65

Prism

Back 65

a solid that is formed by the union of all the line segments that connect corresponding points on two congruent polygons that are located in parallel planes

Front 66

Pyramid

Back 66

a space figure whose base is a plane figure and whose faces are triangles with a common corner

Front 67

Base

Back 67

the flat side of a cylinder or cone: the flat side of a polyhedron that gives the shape its name

Front 68

Quadrilateral

Back 68

a polygon with 4 sides

Front 69

Customary System

Back 69

a measurement system that measures length in inches, feet, yards, and miles; capacity in cups, pints, quarts, and gallons; weight in ounces, pounds, and tons; and temperature in degrees Fahrenheit

Front 70

Metric System (SI)

Back 70

a measurement system that measures length in millimeters, centimeters, meters, and kilometers; capacity in millimeters and liters; mass in grams and kilograms; and temperature in degrees Celsius

Front 71

Capacity

Back 71

the maximum amount that can be contained by an object; often refers to measurement of a liquid

Front 72

Area

Back 72

the measure, in square units, of the interior region of a 2-dimensional figure or the surface of a 3-dimensional figure

Front 73

Mass

Back 73

the amount of matter in an object

Front 74

Length

Back 74

the distance along a line or figure from one point to another

Front 75

Weight

Back 75

a measure of the heaviness of an object