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7 Cards in this Set
- Front
- Back
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Natural numbers
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The "counting" numbers:
1, 2, 3, 4, 5, 6, 7, ... |
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Whole numbers
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The natural ("counting") numbers and also zero:
0, 1, 2, 3, 4, 5, 6, 7, ... |
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Integers
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The natural numbers, the negatives of the natural numbers, and zero:
... -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, ... |
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Rational numbers
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All (real) numbers that can be represented as a fraction of two integers. (The decimal, if any, is terminating or non-repeating.)
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Irrational numbers
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All (real) numbers that can not be represented as a fraction of two integers. (The decimal is non-repeating.)
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Real numbers
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Includes: zero, the natural numbers, the negatives of the natural numbers, the rational numbers, and the irrational numbers.
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Complex numbers
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All numbers that can be written in the form
a + bi where a and b are real numbers and i is the "imaginary unit", equal to the square root of -1. |
