GED Math

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93 Terms

1

sum

the answer to an addition problem

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2

the difference

the answer to a subtraction problem

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3

product

the answer to a multiplication problem

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4

quotient

the answer to a division problem

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5

divisor

the number you divide by

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6

remainder

the number that remains after subtraction

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7

words used in addtion word problems

sum, total, all together

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8

words used in a subtraction word problem

how much more, how much less, find the difference, and deduct

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9

words often used in division word problems

share, split, per, average and grouped into

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10

gross

total amount of salary before deducting taxes, espenses, etc.

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11

net

amount of salary remaining after deducting taxes, expenses, etc.

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12

parentheses in a math equation

do this part first

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13

exponent

a mathematical notation indicating the number of times a quantity is multiplied by itself

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14

base number

a number that has an exponent

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15

square root

a number that when multiplied by itself equals a given number

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16

order of operations

Please Excuse My Dear Aunt Sally P - parentheses E - exponents M - multiplication D - division A - addition S - subtraction

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17

Mean or average

The sum (+) of all data divided by the number of data points

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18

median

The middle number in a set of numbers that are listed in order

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19

perimeter

the sums of the lenghts of all sides of a figure

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20

length

longer sides of a rectangle

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21

width

shorter sides of a rectangle

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22

area

the measure of flat surface inside its perimeter

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23

volume

the amount of space inside a three-dimensional figure v=(pi X r squared)h -- volumn = (pi X radius squared)height

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24

fraction

a small part or item forming a piece of a whole

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25

numerator

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

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26

denominator

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

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27

equivalent fractions

different fractions that name the same amount

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28

reducing fractions to the lowest terms

the smallest equivalent fraction

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29

improper fraction

a fraction whose numerator is larger than the denominator

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30

mixed number

a number made up of a whole number and a fraction

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31

lowest common denominator

the smallest number, other than zero, that can be the denominator for two or more common fractions

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32

triangle

a three-sided polygon

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33

perimeter of a triangle

add all the sids

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34

area of a triangle

A=1/2 bh -- Area = 1/2 base X height

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35

right triangle

a triangle with one right angle

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36

parallelograms

similar to a rectangle, four sids, and each pair of opposite sides are parallel and equal

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37

area of a parallelogram

A = bh -- Area=base x height

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38

1 year

365 days 52 weeks 12 months

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39

1 pint

16 ounces 2 cups

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40

1 quart

32 ounces 4 cups

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41

1 gallon

4 quarts 128 ounces 16 cups

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42

1 foot

12 inches

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43

1 yard

3 feet 36 inches

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44

1 pound -- 1lb

16 ounces

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45

1 ton

2,000 pounds

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46

1 liter

approx. 1 quart

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47

1 milliliter

1/1000 of a liter

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48

1 gram

1/28 of an ounce

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49

1 milligram

1/1000 of a gram

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50

1 kilogram

1000 grams 2.2 pounds

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51

1 meter

39 inches

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52

1 millimeter

1/1000 of a meter

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53

1 kilometer

1000 meters .62 miles

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54

tenths

0.1

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55

hundredths

0.01

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56

thousandths

0.001

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57

ten thousandths

0.0001

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58

hundred thousandths

0.00001

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59

circumfrence of a circle

the distance around a circle c=pi X d -- circumfrence = pi X diameter

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60

center of a circle

exact middle of a circle

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61

radius of a circle

is the line segment connecting the center of the circle to any point on the circle

r=d/2 -- radius=diameter/2

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62

diameter of a circle

A line that passes through the center of the circle, connecting any two points

d=2r -- diameter=2 X radius

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63

pi

3.14

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64

cubic units

the units volume is measured in

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65

line graph

a type of graph used to show the relationship between two variables that are numbers on an x-axis and a y-axis

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66

pie chart

a circular chart divided into triangular areas proportional to the percentages of the whole

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67

table

a set of data arranged in rows and columns

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68

bar graph

a graph that uses horizontal or vertical bars to display data

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69

number line

a line for representing and graphing numbers. Each point on the line corresponds to a number.

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70

monomial

an algebraic expression consisting of a single term that does not require any addition or subtraction -- 5y

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71

coeffcient

a number that is being multiplied to be a variable -- in 5y the 5

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72

variable

a symbol (like x or y) that is used in mathematical or logical expressions to represent a variable quantity -- in 5y the y

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73

adding numbers with signs

if the signs are the same (-,-) or (+,+) add the 2 numbers and label with the sign 7 + 3 = 10 -5 + (-3) = -8

If the signs are different (-,+) or (+,-) arrange with the larger number first then subtract then label the answer with the sign of the larger number 4 + -6 = -6 + 4 = -2

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74

subtracting numbers with signs

step 1: change the subtraction problem into an addition problem

step 2: change the sign of the second number

step 3: follow the rules of adding numbers with signs

  • 16 - 6 step 1: -16 + 6 = step 2: -16 + (-6) = step 3: -16 + (-6) = -22

12 - (-7) = 12 + (-7) = 12 + 7 = 12 + 7 = 19

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75

multiplying and dividing with signed numbers

Signs are alike -- answer is positive Signs are different -- answer is negative

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76

ratio

a comparison of two numbers

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77

vertex of an angle

the initial point of an angle

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78

right angle

angle that is 90 degrees

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79

acute angle

angle that measures less than 90 degrees

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80

obtuse angle

An angle that measures more than 90 degrees but less than 180 degrees

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81

straight angle

an angle that measures exactly 180 degrees

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82

complementary angles

Two angles whose sum is 90 degrees

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83

supplementary angles

Two angles whose sum is 180 degrees

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84

bisectors

a line that divides the angle in half

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85

vertical angle

either of two equal and opposite angles formed by the intersection of two straight lines

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86

transversal

a line that intersects two or more parallel lines

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87

equilateral triangle

a triangle with three equal sides -- all angles = 60 degrees (sum of all angles is 180)

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88

isoceles triangle

Triangle with 2 equal sides and 2 equal angles (sum of all angles is 180)

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89

scalene triangle

A triangle with sides of different lengths and no two angles are the same (sum of all angles is 180)

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90

right triangle

one of the angles is always 90 degrees, the other two sides could be the same or different but will always = 90 degrees (sum of all angles is 180)

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91

sum of all angles in a triangle

the sum of all angles of a triangle always adds up to 180 degrees

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92

similar triangles

similar triangles have corresponding angles that are equal and corresponding sides that are proportional

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93

pythagorean theorem

a²+b²=c² where c always represents the hypotenuse and a and b represent the other sides of a right triangle

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