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# ABCTE Math Flashcard

### Flashcards of ABCTE Math exam.

Rational Numbers can be written as a fraction, a/b, where a and b are integers and b can not = 0. They include fractions, repeating decimals and terminating decimals.
Irational Numbers Numbers that can not be written as a fraction a/b, where a and b are integers and b can not = 0 Irrational numbers became decimals that do not terminate or repeat.
whole Numbers the counting numbers with 0
Integers positive and negative counting numbers including 0
Communitive Property ORDER not important for addition and multiplication.
Associative Property GROUPING not important in addition or subtraction
Identity Property SELF the number wants to stay the same addition = # plus 0 = # Multiplication = # x 1 = # Multiplication = # x 0 = 0
Distributive Property for any # a, b. c a (b+c) = ab + ac and a(b-c) = ab - ac
expression a symbol or combination of symbols that represent a quantity
prime number a positive integer not divisible by any positive integer other than itself and the number
prime # 1-25 2,3,5,7,11,13,17,19,23
composite numbers have more than 2 factors, all even numbers are composites
cool Rules #1 #1 is neither prime nor composite 1x1=1 only 1 factor and prime #s have 2 factors
cool Rule #2 #'s divisible by 2 are even and end in 0
cool Rule #3 sum digits of # if divisible by 3 then the # is divisible by 3
cool Rule #4 final 2 digits of # divisible by 4 then the # is divisible by 4
cool Rule #5 one's place digit is 0 or 5 then the # is divisible by 5
Cool Rule #6 divisible by 6 if divisible by 2 and 3. must be even # for which the sum is divisible by 3
cool Rule #7 no shortcuts just divide # by 7
cool Rule #8 for # greater than 1000. Ends in a 3 digit # divisible by 8.
Cool Rule #9 sum of the digits of # must be divisible by 9
Cool Rule #10 divisible by 10 if the digit in one's place is 0
prime factorization process that finds the prime # product of a given composite #. T's and Trees's
Created by: Dentalcare
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