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Algebra Terms
review of Algebra Terms
| Question | Answer |
|---|---|
| 1, 2, 3, 4, 5, . . . are called? | Counting or natural numbers |
| the set of natural numbers plus the number zero | Whole numbers which include the number of zero |
| Who were the first to use zero to develop the place-value number system that we usetoday? | Arab and Indian scholars |
| Zero is the _____, because adding zero to a number does not change the number | |
| 1 is the _______ because multiplying a number by 1 does not change it. | |
| negative versions of the countingnumbers is called the ____? | integers |
| . . . –4, –3, –2, –1, 0, 1, 2, 3, 4, . . . | Whole numbers plus negatives |
| For every real number n, there exists its opposite, denoted – n, such that the sum of n and – n is zero, or | n + (– n) = 0 |
| “–3” is one object—it stands for? | "negative three,” |
| zero is considered to be neither negative nor | positive |
| Add fractions to the set of integers, we get the set of | rational numbers |
| “rational” contains the word “ratio,” | which should remind you of fractions |
| bottom of the fraction is called | denominator |
| denomination—ittells you what size fraction we are talking about | fourths, fifths, etc. |
| The top of the fraction is called the | numerator |
| The denominator cannot be | zero! Numerator could be a zero |
| Fractions can be numbers smaller than 1, like 1/2 or 3/4 called? | proper fractions |
| they can be numbers bigger than 1 (called ______ ), like two-and-ahalf, which we could also write as 5/2 | improper fractions |
| All integers can also be thought of as rational numbers, with a denominator of 1: | 3= 3/1 |
| There are numbers that cannot be expressed as a fraction, andthese numbers are called _____ because they are not rational. | irrational |
| Any number that represents an amount of something,such as a weight, a volume, or the distance between two points, will always be a | a real number |
| The real numbers have the property that they are ordered, which means that given anytwo different numbers we can always say that one is greater or less than the other. | For any two real numbers a and b, one and only one of the following three statements istrue:1. a is less than b, (expressed as a < b;2. a is equal to b, (expressed as a = b;3. a is greater than b, (expressed as a > b) |
Created by:
stamberger
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