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# MATH WHAT ARE REAL NUMBERS.

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Everything above but not including zero.

Posted on May 11, 2008

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### MATH WITH DIVISION

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### How do you convert decimal complex numbers in TI-84 (OS 2.53) to fractions?

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See below.

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### I have a very strange math teacher that collects old math books.One day i asked him how many old math books he has.Being a math teacher, he responded, "if i divide the books into two unequal whole...

Your teacher has 64 old math books.
Define the variables:
n = the total number of books x + y = the number of books divided into two groups (x being one set of books and y the other)
Equation set-up from the problem:
64(x - y) = x^2 - y^2
Work it out:
64(x - y) = (x + y)(x - y)
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Therefore, 64 = n

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### UNDERSTANDING MATH PROPERTIES OF REAL NUMBERS

Hii,here is list of basic real numbers properties applying them you can solve the problems easily.

Assuming a,b,c,d are real numbers:

1)Commutative Property
a) Property of Addition: a+b = b+a
b)Property of Multiplication: ab = ba

2)Associative Property
a)Property of Addition: (a+b) + c = a + (b + c)
b)Property of Multiplication: ( ab )c = a ( bc )

a+0 = a where 0 is the additive identity
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a+(-a) = 0
5)Multiplicative Identity:
For real number a,
1 X a = a
where 1 is the multiplicative identity
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For real number X where a≠0, there exists 1/asuch that
a X(1/a) = 1
7)Zero Product Law:
If ab = 0, then a=0 or b=0 or both a and b = 0.

8)Distributive Properties:
a)Left distributive law
a (b + c ) = ab + ac
b)Right distributive law
(a + b) c = ac+ bc

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### Problem solving Strategy guess and test

The two numbers 3 and 24

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Enjoy, and thanks for choosing Fixya!

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