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MATH 103 - Chapter 7,8,9
Vocabulary
11
Mathematics
Undergraduate 1
12/07/2010

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Term
multiple
Definition
a whole number, a, that is multiplied by another whole number

e.g. multiples of 2: 4 6 8 10 12
Term
least common multiple (LCM)
Definition
the smallest number greater than zero that is a common multiple of each of the numbers in question

e.g. LCM (4,3) = 12
Term
least common denominator (LCD)
Definition
the result when the set of numbers in question are denominators when undertaking the process of LCM
Term
multiplicative inverse (reciprocal)
Definition
a number, a, when multiplied by another specific number, the product will be one

this is denoted to be 1/a
Term
division by fractions
Definition
in general we say:
(a/b) รท (c/d) = (a/b) x (d/c) = (ad/bc)
Term
multiplicative comparison
Definition
given two quantities, a method to determine how many times as large as one of them the other one is
Term
ratio
Definition
the result of comparing two quantities multiplicatively

written x:y or x/y, pronounced: x to y, x is to y.
Term
proportion
Definition
a statement that two ratios are equal to one another

the quantities are then said to be proportional
Term
unit ratio
Definition
a ratio for which the first quantity is represented by some nonzero number and the second quantity is represented by 1

e.g. x:1
Term
rate
Definition
a ratio of quantities that change without changing the value of the ratio
Term
percent
Definition
a ratio for which the value of the second quantity is understood to be 100
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