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Math Vocab > pre algebra > Flashcards

pre algebra Flashcards

1
Q

natural #’s

A

1, 2, 3, ,4 ….

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2
Q

whole #’s

A

0, 1, 2, 3, …..

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3
Q

standard form

A

322

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4
Q

place value

A

position of digit in a number is called

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5
Q

period

A

group of three digits is called

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6
Q

expanded form

A

300 + 20 + 2

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7
Q

words used when adding

A

total, sum

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8
Q

words used when subtracting

A

difference

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9
Q

words used when multiplying

A

product, factor, of

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10
Q

words used when dividing

A

quotient

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11
Q

in words

A

three hundred twenty-two

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12
Q

commutative property

only in addition & multiplication

A

order of addition does not matter
4 + 8 = 8 + 4
9 * 2 = 2 * 9

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13
Q

associative property

only in addition & multiplication

A

grouping does not matter
(3+6) + 2 = 3 + (6+2)
(2 * 3) * 4 = 2 * (3 * 4)

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14
Q

multiplication property of zero

A

a * 0 = 0

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15
Q

multiplication property of 1

A

a * 1 = a

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16
Q

distributive property

A

6(4 + 5) = 6(4) + 6(5)

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17
Q

rounding

A

does not matter unless stated

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18
Q

area

A

a = length * width

don’t forget to square it!!

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19
Q

perimeter

A

sum of sides (length) added together

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20
Q

addends

A

’s that are being added

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21
Q

minuend

A 
# you are subtracting from
first # in problem
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22
Q

subtrahend

A 
# you are subtracting
after the subtraction sign
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23
Q

divisor

A 
# in front of division bracket
# after the division sign
denominator
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24
Q

division property of 1

A

the quotient of any # (except 0) and that same # is 1

the quotient of any # and 1 is that same #

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25
Q

division property of zero

A

quotient of 0 and any # (except 0) is 0
quotient of any # and 0 is not a # - undefined
if 0 is in front of division bracket, 0 after division sign or 0 is the denominator

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26
Q

exponent

A

little number after base

number of times base is a factor

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27
Q

Order of Operations

~ alway work left to right ~

A 
P: grouping symbols first
E: exponents
M: multiply
D: divide
A: add
S: subtract
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28
Q

variable

A

a letter that represents a number and can change

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29
Q

constant

A

stays the same

30
Q

algebraic expression

A

combination of operations on variables and #s
all we do is evaluate expressions; exponents have to be the same to combine, coefficients can be different then it’s simplified

31
Q

equations

A

expression = expression

we solve

32
Q

negative #s

A

numbers less than 0

symbol is -

33
Q

integers

A

…, -3, -2, -1, 0, 1, 2, , …3

34
Q

>

A

is greater than

35
Q
A

is less than

36
Q

absolute value

A

number’s distance from 0 on the # line
the symbol is | |
always positive

37
Q

opposites

A

two numbers that are the same distance from 0 on the # line but are on opposite sides of 0

38
Q

sign stays the same

A

adding two number that have the same sign

39
Q

change sign

A

adding different signs. subtract the smaller # from the larger # and keep sign of larger

40
Q

opposite of a negative

A

is a positive

41
Q

subtracting negatives

A

is adding and keeping the - sign

42
Q

positive integers

A

if signs are the same

multiplying & dividing

43
Q

negative integers

A

if signs are different

multiplying & dividing

44
Q

addition property of equality

A

a = b
a + c = b + c
a - c = b - c

45
Q

multiplication property of equality

A

a = b
a * c = b * c
a / c = b / c

46
Q

average

A

sum of #s divided by # of #s

47
Q

signed #s

A

positive, negative and 0

48
Q

numerical coefficient

A

number factor of a variable term

49
Q

term

A

addends of an algebraic expression

50
Q

like terms

A

exact same terms, can have different numerical coefficients

51
Q

us to meter

A 
10oz estimates 28 g
2.2 lbs estimates 1 kg
1 qt estimates 1 L
1 yd estimates 1 m
6.2 mi estimates 10 km
52
Q

expressions

A

combine like terms, there is no =

variables with their components have to be the same, coefficients can be different

53
Q

ratios

A

the quotient of two quantities

54
Q

rates

A

compare different kinds of quantities

55
Q

unit rate

A

a rate with a denominator of 1

56
Q

proportions

A

states that two ratios are equal

cross multiply to see if true

57
Q

square of a #

A

the # times itself

58
Q

square root

A

reverse process of squaring

uses a radical sign

59
Q

pythagorean theorem

A

length of the legs of right triangle equal the hypotenuse

all squared

60
Q

congruent triangles

A

same shape and same size

61
Q

similar triangles

A

same shape but not necessarily the same size

62
Q

percent proportion

A

amount / base = percent

63
Q

precent of increase

A

equals amount of increase / original amount

64
Q

precent of decrease

A

equals amount of decrease / original amount

65
Q

sales tax

A

equals tax rate * purchase price

66
Q

total price

A

equals purchase price + sales tax

67
Q

commission

A

equals commission rate * sale

68
Q

amount of discount

A

equals discount rate * original price

69
Q

sale price

A

equals original price - amount of decrease

70
Q

simple interest

A

I = P * R * T

Math Vocab (6 decks)

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