Can be divided evenly only by 1 or itself.
And it must be a whole number greater than 1.
a number with more than two factors
The smallest multiple that is exactly divisible by every member of a set of numbers
Steps to find LCM
1) List prime factors of each number in expanded form. 2) Circle each factor where it appears most. 3) Multiply circled factors.
Write the number then a colon then list out multiples. that is 1 x number then 2 x number ect.. Do the same for the other number until a multiple matches a multiple of the other number
Have the same value, even though they may look different.
Writing an Equivalent Fraction
Two equivalent fractions may have a different numerator and a different denominator. (A fraction is also equivalent to itself. In this case, the numerator and denominator would be the same.)
Writing equivalent Fractions LCD
A fraction is in lowest terms when its numerator and denominator have no common factors other than 1
Writing fractions in lowest terms
Places to the right of the decimal point
the same way as we round whole numbers
Rounding a Decimal
Convert a fraction to a decimal
numerator divided by denominator
a terminating decimal is a decimal whose digits end. repeating decimals have a pattern in their digits that repeat forever.
Decimal to a Fraction
The ratio of a number to 100 (per one hundred). The symbol %
Convert a Percent to a Decimal
move decimal two places to left
Convert Decimal to a Percent
move decimal two places to the right
A way to write a solution that includes brackets.
A number that can be expressed as a fraction
Numbers that cannot be expressed as a ratio of two integers. Their decimal expansions are nonending and nonrepeating.
the set of numbers that includes rational and irrational numbers.
Real Number Line
a a line of negatives and positives
the act of drawing points on a number line or graph
is when you write them form least to greatest or greatest to least,
a numerical value regardless of its sign
Operations on Signed Numbers
keep the sign of both the numbers and add .
a+-a=0 (where you add a number and its opposite and it equals zero)
Subtracting Real Numbers
a-b = a+(-b)
a-(-b) = a+b
If a & b are positive, then (-a)(-b)=ab, where ab is the whole-number product of a & b. That is, the product of two negatives is a positive.
a x 1/a = 1
Positive ÷ positive = positive
Example: 72 ÷ 9 = 8
Negative ÷ negative = positive
Example: (-132) ÷ (-12) = 11
Positive ÷ negative = negative
Example: (-75) ÷ 25 = -3
Negative ÷ positive = negative
Example: (-44) ÷ 11 = -2
1.) Multiply numerators across.
2.) Multiply denominators across.
To divide fractions, invert the second one and multiply
Fractions with Same Denominators
Least common denominators of two or more factors
Fractions with Denominators
Steps to Add or Subtract Fractions
Adding and Subtracting Decimals
line up the decimals
The properties that state the sum of any number and zero is that number and the product of any number and one is that number.
Using the Identity Properties
changing the grouping doesnt change the sum of the product
Properties Of Zero
1: a x 0=0 2: 0/a=0 3: a/0=DNE
to find the value of
Evaluating Exponential Expressions
Order of Operations
PEMDAS-Please Excuse My Dear Aunt Sally. Parentheses Exponent Mulltiply Add Subtract