# 1st semster review flashcards

## Terms

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Least Common Multiple
(LCM)
the smallest number that all numbers can become - uses the cake method (never smaller than the biggest number)
Greatest Common Factor
(GCF)
the biggest number that all of the numbers can be divided by - uses the tree method (never bigger than the smallest number)
factor
a number that divides another number without a remainder (always equal to or smaller than the original number)

ie. factors of 24 = 1, 2, 3, 4, 6, 8, 12, 24
multiple
the product of the original number and another number (always equal to or larger than the original number)

ie. multiples of 5 = 5, 10, 15, 20, 25
ascending order
from smallest to biggest
descending order
from biggest to smallest
absoute value
the distance the number is from zero on a number line - the distance can NEVER be negative
composite number
a whole number that has factors besides 1 and itself - the smallest composite number is 4
prime number
a whole number whose only factors are 1 and itself - 2 is the smallest prime and the ONLY even prime
coordinate pairs
used in graphing - (x,y) - the first number tells you right or left; the second number tells you up or down
divisibility rule for 2
if the number ends in 0, 2, 4, 6, or 8
divisibility rule for 5
if the number ends in 0 or 5
divisibility rule for 6
if it is divisible by BOTH 2 and 3
divisibility rule for 10
if it ends in 0
divisibility rule for 3
if the sum of the digits adds up to a number divisibile by 3

ie. 123 = 1 + 2 + 3 = 6; 6 is divisibile by 3 so 123 is divisible by 3
divisbility rule for 9
if the sum of the digits is divisible by 9

ie. 63 = 6 + 3 = 9; 9 is divisible by 9 so 63 is divisible by 9
equivalent
equal
equivalent fractions
two or more fractions that are equal to each other
equivalent decimals
two or more decimals that are equal to each other
exponent
shows repeated multiplication
factor tree
used for prime factorization; used to find a numbre's prime factors
frequency table
a 3 column chart that lists the items, a tally section, and the frequency
improper fraction
when the numerator (top number) is bigger than the denominator (bottom number)
numerator
the top number in a fraction
denominator
the bottom number in a fraction
integers
a set of whole numbers and their opposites

NOTE: 0 is not an integer
inverse operations
opposite operations; they undo each other

multiplication - division
Least Common Denominator
(LCD)
smallest common denominator a set of fractions can become
line plot
uses a number line and x's to represent data
mean
the average of the data - add up all of the data and divide by the number of items in the data
median
the middle number of a set of data in numerical order
mode
the most common number(s) of the set of data
range
the difference betwen the biggest and the smallest numbers in a set of data; subtract big minus small
order of operations
1. Parenthesis
2. Exponents
3. Multiply and Divide from LEFT to RIGHT
4. Add and Subtract from LEFT to RIGHT
origin
(0,0) - where you start from when graphing ordered pairs
power
a number expressed using an exponent
prime factorization
uses factor trees to write the number as a product of its primes

ie. 24 = 2 x 2 x 2 x 3
probability
the number of correct chances over the total number of chances
scientific notation
a number written as a prduct of two factors when the first is a number greater than 1 but less than 10 and the second is a power of 10
slope
rise over run; up or down over the left or right
square root
a number which when multiplied by itself equals the given number
symmetry
when one side of a figure is the mirror image of the other side
terminating decimal
a decimal that stops
repeating decimal
a number that repeats itself in a pattern
variable
a symbol, usually a letter, that stands for a number; an unknown
x - axis
the horizontal bar of a graph
y - axis
the vertical bar of a graph

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