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Ms. Garcia Math |
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Natural Numbers |
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Natural numbers are the counting numbers {1, 2, 3,...} (the positive integers) |
1, 2, 3, … |
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Integers |
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Integers are the natural numbers and their negatives {... -3, -2, -1, 0, 1, 2, 3, ...}. |
…-3, -2, -1, 0, 1, 2 3, … |
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Whole Numbers |
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A whole number is a number that is not a fraction or a decimal |
0, 1, 2, 3 |
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Rational |
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Rational numbers are the ratios of integers, also called fractions |
1/2, 2/3, 5/8 |
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Irrational Numbers |
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an irrational number is any real number that cannot be expressed as a fraction a/b, where a and b are integers, with b non-zero, |
The square roots of all numbers which are not perfect squares are irrational |
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Prime numbers |
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Numbers that can only be divided by 1 and itself and have no remainders. |
Prime Numbers = 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, … |
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Composite Numbers |
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Numbers that can be divided by more than two factors and have no remainders. |
Composite Numbers = 4, 6, 8, 10, 12, 14, 16, 18, 20, . |
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Neutral numbers |
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These numbers are not prime nor composite:
0 and 1 |
0, 1 |
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Even number |
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Is an integer which is "evenly divisible" by two. |
2, 4, 6, 8, .. |
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Odd number |
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Is a whole number that is not divisible by 2. |
1, 3, 5, 7, 9, . . . . |
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