### 84 terms by lovinghcl

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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

a+b=b+a

### expanded form

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

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

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

a period of 10 years

### millenium

a period of one thousand years

### percent

A ratio that compares a number to 100

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

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

Example: