Flashcards in Definitions Deck (18):

1

## Real Number

### any number with a decimal expansion

2

## Natural numbers

### 1,2,3,4,

3

## Whole numbers

### 0,1,2,3,4,

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## Integers

### whole numbers and negatives -2,-1,0,1,2,3

5

## Rational Numbers

###
All numbers whose decimal expansion either terminate or repeat

or the ratio of two integers

6

## Irrational Numbers

### all real numbers that are not rational

7

## Nested Sets

### we say a group of sets are nested if each set is contained in another set

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## Closure of Addition

### a+b is a real number

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## Commutative of Addition

### a+b=b+a

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## Associative of Addition

### (a+b) +c = a+ ( b+c)

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## Identity of Addition

###
a+0=a

0+a=a

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## Inverse of Addition

### a+ -a=0

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## Closure of Multiplication

### ab is a real number

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## Commutative of Multiplication

### ab=ba

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## Associative of Multiplication

### (ab)c =a(bc)

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## Multiplicative Identity

###
a x 1= a

1 x a = a

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## Multiplicative Inverse

### a x 1/a = 1 when a is not = to 0

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