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15 Cards in this Set
- Front
- Back
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Less than
The quantity to the left of the symbol is less than the quantity to the right. |
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>
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Greater than
The quantity to the left of the symbol is greater than the quantity to the right. |
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≤
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Less than or equal to
The quantity to the left of the symbol is less than or equal to the quantity to the right. |
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≥
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Greater than or equal to
The quantity to the left of the symbol is greater than or equal to the quantity to the right. |
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| x |
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Absolute value
The positive distance a number enclosed between two vertical bars is from 0. |
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!
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Factorial
The product of all the numbers up to and including a given number. |
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Parallel
In geometry, two lines separated by this symbol have the same slope (go in exactly the same direction). |
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°
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Degrees
A measure of the size of an angle. There are 360 degrees in a circle. |
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π
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Pi
The ratio of the circumference of any circle to its diameter; approximately equal to 3.14. |
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Whole numbers
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The set of counting numbers, including zero
Ex: 0, 1, 2, 3 |
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Natural numbers
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The set of whole positive numbers except zero
Ex: 1, 2, 3, 4 |
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Integers
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The set of all positive and negative whole numbers, including zero, not including fractions and decimals. Integers in a sequence, such as those in the example to the right, are called consecutive integers.
Ex: –3, –2, –1, 0, 1, 2, 3 |
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Rational numbers
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The set of all numbers that can be expressed as integers in fractions—that is, any number that can be expressed in the form , where m and n are integers
Ex: 9/8, 1/2, 3/4 |
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Irrational numbers
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The set of all numbers that cannot be expressed as integers in a fraction
Ex: π, , 1.010100001000110000 |
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Real numbers
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Every number on the number line, including all rational and irrational numbers
Ex: Every number you can think of |
