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Natural or Counting Numbers
1,2,3,4...

Whole Numbers
0,1,2,3,4...

Rational Numbers
 p/q (fractions)
 q cannot be zero (undefined)

Irrational Numbers
pi (decimal that goes on forever and doesn't repeat)

Real Numbers
Rational and Irrational numbers.

What is the Commutative Property?
 (Add.): a+b=b+a
 (Mult.): ab=ba

What is the Associative Property?
 (Add.): (a+b)+c=a+(b+c)
 (Mult.): (ab)c=a(bc)

What is the Identity Property?
 (Add.): 0+a=a and a+0=a
 (Mult.): a*0=0 and 0*a=0

What is the Inverse Property?
 (Add.): a+(a)=0
 (Mult.): a*(1/a)=1

What is the Distributive Property?
a(b+c)=ab+ac

