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counting numbers

all the numbers in the sequence 1, 2, 3, 4, and so on

sequence

a following of one thing after another in time

term

a number, a variable, or the product of a number and a variable

whole numbers

counting numbers and zero

digits

the symbols used to write numbers: 0, 1, 2, 3, 4, 5, 6, 7, 8, or 9

community property of addition

a+b=b+a

addends

numbers that are added together

expanded form

the form of a number that shows the value of each digit;

Ex. 300,000+40,000+5,000+700+20

Ex. 300,000+40,000+5,000+700+20

difference

the answer to a subtraction problem

inverse operation

Opposite operations that undo each other; add and subtract or multiply and divide

fact family

A group of three numbers related by addition and subtraction or by multiplication and division.

ordinal numbers

numbers that describe position or order (first, second . . .)

identity property of addition

Adding zero to any number will not change the number. Example: 6 + 0 = 6.

algorithm

a step-by-step procedure for solving a problem

even

a whole number that is divisible by 2

odd

a whole number that is not divisible by two

integers

Positive and Negative Whole Numbers and 0. Examples: .... -3, -2, -1, 0, 1, 2, 3.....(Does not include fractions or decimals)

equation

A mathematical sentence that contains an equals sign.

geometry

mathematics dealing with lines, angles, surfaces, and solids

point

an exact position

line

a straight collections of points extending in opposite directions without end

line segment

part of a line with two endpoints

ray

(mathematics) a straight line extending from a point

horizontal

Going straight across from side to side

vertical

upright; perpendicular to horizontal

oblique

slanted or sloping; not horizontal or vertical

number line

A line for representing and graphing numbers. Eachpoint on the line corresponds to a number.

negative numbers

numbers less than zero and to the left of zero on a number line

tally marks

small marks used for counting with the largest group being a group of five

multiples

Products that result from multiplying the number by each of the whole numbers. Ex) 6: 6, 12, 18, 24, 30, 36...

factors

Numbers that are multiplied together to get a product

product

a quantity obtained by multiplication

communitive property

States you can add or multiply in any order

property of zero for multiplication

zero times any number is zero

identity property of multiplication

the product of any number and 1 is equal to the original number (a x 1 = a)

division

an arithmetic operation that is the inverse of multiplication

dividend

the number being divided

quotient

the answer to a division problem

fraction

part of a whole

denominator

the bottom number in a fraction, the part of a fraction below the line, which tells how many equal parts there are in the whole or in the group.

numerator

the part of a fraction above the line, which tells how many parts are being counted.

division algorithm

This is the method for solving division problems with the following steps: divide, multiply, subtract, bring down (26)

a.m.

ante meridiem, before noon

p.m.

after noon, post meridiem

century

a period of 100 years

scale

a type of number line used for measuring

Celsius

Metric unit for measuring temperature; On this scale water freezes at zero and boils at 100.

Fahrenheit

A temperature scale with the freezing point of water 32 degrees and the boiling point of 212 degrees is also known as,

leap year

a year in which an extra day is added to the calendar, year that has an extra day; occurs every fourth year

common year

A year with 365 days

decade

a period of 10 years

millenium

a period of one thousand years

percent

A ratio that compares a number to 100

intersect

to cross

parallel lines

lines that never intersect

perpendicular

intersect and form right angles

angle

opening between intersecting lines or segments

right angle

like a corner of a square

acute angle

angle with opening less than right angle

obtuse angle

angle with oppening greater than right angle

straight angle

angle open to form a straight line

plane

flat surface that extends without end

polygons

a closed figure, all straight lines, and no intersecting lines

vertex

A point where two or more straight lines meet.

sides

sideslines segments on a polygon

quadrilateral

a four-sided polygon

congruent

having the same size and shape

similar

having the same or similar characteristics

exact numbers

numbers which always have the same value regardless of who measures them

round numbers

refers to numbers ending with one or more zeros

elapsed time

is the amount of time between two points in time

acute triangle

a triangle with 3 acute angles

obtuse triangle

a triangle that contains an obtuse interior angle

right triangle

a triangle with one right angle

equilateral triangle

a triangle with three congruent sides

isoceles triangle

a triangle that has at least 2 congruent sides

scalene triangle

a triangle with no congruent sides

mixed numbers

A whole number and a fraction together.

degrees

a unit for measuring angles

protractor

an instrument for drawing/measuring angles

common denominators

Denominators that are the same

international system of units

A REVISED VERSION OF THE METRIC SYSTEM

metric system

the basic unitof length in the metricsystemis a meter

U.S. Customary System

Units in the U.S.Customary System are not related by the number 10