Chapter 2

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Rational Numbers

Last updated 4:04 PM on 1/6/23
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11 Terms

1
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rational number
a numbers that can be expressed as a/b, where a and b are integers and b cannot equal zero
2
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examples of rational numbers
\-4, 3,5, -1/2,3/4, and 0. (integers, positive/negative numbers, or zero)
3
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how to compare and order rational numbers

1. express all the numbers in the same form. ie. all written as fractions or all as decimals.
2. place them all on a number line.


1. larger numbers are to the right of smaller numbers.
4
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how to compare rational numbers. ie. determine which one is larger or smaller.

1. you can use equivalent fractions.


1. you need a common denominator. then compare the numerators.
2. you can use decimals


1. convert fractions to decimals and compare the numbers.

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5
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identify a rational number between two given rational numbers

1. use a number line


1. identify a decimal between the given ones
2. convert decimal into a fraction

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6
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equivalent fractions
fractions that represent the same rational number
7
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order of operations

1. brackets
2. exponents
3. division
4. multiplication
5. addition
6. subtraction

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8
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how to add and subtract rational numbers in fraction form

1. have a common denominator
2. rewrite the mixed numbers as improper fractions
3. add numerators
9
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multiplying rational numbers in fraction form
multiply numbers left to right
10
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dividing rational numbers in fraction form
multiply by the reciprocal or the second fraction. ie. flip the numbers of the second fraction and multiply as usual
11
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what is a square root?
a square root is a number multiplied by itself. 3x3=9, the square root of 9=3 pg.72