# Basic math principles

 The flashcards below were created by user b.redsangria on FreezingBlue Flashcards. Integers - Whole number - positive or negative - 0 is an integer (neither positive or neg) *does not include fractions Consecutive Integers Listed in increasing size w/o any integers missing in between Formula: n, n+1, n+2, n+3, etc... Even: -2, 0,2,4,6,8 Odd: -3, -1, 1, 3, 5 Distinct mathematical way of saying "different" ex. Count the distinct prime factors of 12 = 2 and 3 12 = 2 x 2 x 3 (can only count 2 once) Digits Ten digits: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 All digits are integers Most likely: count digits or supply the missing digits Prime numbers Divided evenly only by itself and i All prime number are positive Positive & Negative Multiplication pos x pos = pos pos x neg = neg neg x neg = pos Addition pos + neg = 4 + (-3) = 1 neg + neg = -3 + -5 = -8 (treat it like pos) Odd & Even Even - divided by 2 ~ 0 is considered even Odd - can not be divided evenly by 2 even x even = even odd x odd = odd even x odd = even even + even = even odd + odd = even even + odd = odd Prime number - positive integer that can be divided evenly only by two distinct factors: 1 and itself - neither 1 or 0 is prime - all primes are positve Factors and Multiples "Factors are few; multiples are many" Factor - divided evenly into a number Multiple - result of a number mutiplying another Example: Factors of 15 = 1, 3, 5, 15 Multiple = 15 is a multiple of 3; 12 is a multiple of 3 Absolute Value distance between the number and 0 Divisibility Rules Useful divisibility shortcuts: 2 - unit digit can be divided evenly by 2 3 - sum of digits can be divided by 3 easily 4 - the last two digits of the number can be divided by 4 5 - final digit is either 0 or 5 6 - if it divisible by both 2 and 3 Authorb.redsangria ID6564 Card SetBasic math principles Descriptionbasic math Updated2010-03-06T19:04:44Z Show Answers