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8 Cards in this Set
- Front
- Back
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REAL NUMBERS |
Definition: All numbers that can be represented on the number line.
Helpful tip: Until you get to "imaginary numbers" in Algebra 2, "real numbers" can pretty much mean "all numbers from all your math classes ever." |
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NATURAL NUMBERS |
Definition: The counting numbers.
Examples: 1, 2, 3, 4, 5, ...
Helpful tip: They're called "counting numbers" because, when you start counting things on your fingers, you always start with 1. |
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WHOLE NUMBERS |
Definition: Zero and all natural numbers.
Examples: 0, 1, 2, 3, 4, 5 ...
Helpful tip: The letter "O" in the word "WHOLE" looks like the number zero. |
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INTEGERS |
Definition: Whole numbers and their opposites.
Examples: ... -3, -2, -1, 0, 1, 2, 3 ...
Helpful tip: Numbers that (if simplified) have no decimals and no fractions. (i.e. 12/2 doesn't count as a fraction; 19.0 doesn't count as a decimal.) |
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RATIONAL NUMBERS |
Definition: Numbers that can be written as the fraction a/b.
Helpful tip: The word "rational" contains the word "ratio" which is a synonym for the word "fraction." |
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TERMINATING DECIMALS |
Definition: A number that has a finite number of digits.
Examples: 14.68137, -105.21, 3.14, 8.0, 8, -8
Helpful tip: There have been several movies in "The Terminator" series. A synonym of "terminate" is "kill." All terminating decimals have had their endings "terminated" before they could go on and on forever. |
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REPEATING DECIMALS |
Definition: A decimal that has a block of one or more numbers that repeat continuously.
Helpful tip: 7.414243... is not repeating; 35.07007000700007... is not repeating. |
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IRRATIONAL NUMBERS |
Definition: Decimals that go on forever but don't repeat.
Examples: Pi is the most famous irrational number. Also, square roots of whole numbers that are not perfect squares.
Helpful tip: A synonym for "irrational" is "ridiculous" and it would be ridiculous for someone to ask you to write all the number that are in pi. |
