Details

Pre-Algebra Essentials For Dummies


Pre-Algebra Essentials For Dummies


1. Aufl.

von: Mark Zegarelli

6,99 €

Verlag: Wiley
Format: PDF
Veröffentl.: 15.04.2019
ISBN/EAN: 9781119591009
Sprache: englisch
Anzahl Seiten: 192

DRM-geschütztes eBook, Sie benötigen z.B. Adobe Digital Editions und eine Adobe ID zum Lesen.

Beschreibungen

<p><i>Pre-Algebra Essentials For Dummies</i> (9781119590866) was previously published as <i>Pre-Algebra Essentials For Dummies </i>(9780470618387). While this version features a new <i>Dummies</i> cover and design, the content is the same as the prior release and should not be considered a new or updated product. </p> <p>Many students worry about starting algebra. <i>Pre-Algebra Essentials For Dummies</i> provides an overview of critical pre-algebra concepts to help new algebra students (and their parents) take the next step without fear. Free of ramp-up material, <i>Pre-Algebra Essentials For Dummies</i> contains content focused on key topics only. It provides discrete explanations of critical concepts taught in a typical pre-algebra course, from fractions, decimals, and percents to scientific notation and simple variable equations. This guide is also a perfect reference for parents who need to review critical pre-algebra concepts as they help students with homework assignments, as well as for adult learners headed back into the classroom who just need to a refresher of the core concepts.</p> <p><i><b>The Essentials For Dummies</b></i><b> Series</b><br />Dummies is proud to present our new series, <i>The Essentials For Dummies.</i> Now students who are prepping for exams, preparing to study new material, or who just need a refresher can have a concise, easy-to-understand review guide that covers an entire course by concentrating solely on the most important concepts. From algebra and chemistry to grammar and Spanish, our expert authors focus on the skills students most need to succeed in a subject.</p>
<p><b>Introduction 1</b></p> <p>About This Book 1</p> <p>Conventions Used in This Book 2</p> <p>Foolish Assumptions 2</p> <p>Icons Used in This Book 3</p> <p>Where to Go from Here 3</p> <p><b>Chapter 1: Arming Yourself with Math Basics</b><b> 5</b></p> <p>Understanding Sets of Numbers 5</p> <p>The Big Four Operations 6</p> <p>Adding things up 6</p> <p>Take it away: Subtracting 7</p> <p>Multiplying 7</p> <p>Doing division lickety-split 8</p> <p>Fun and Useful Properties of the Big Four Operations 9</p> <p>Inverse operations 9</p> <p>Commutative operations 9</p> <p>Associative operations 10</p> <p>Distributing to lighten the load 10</p> <p>Other Operations: Exponents, Square Roots, and Absolute Values 11</p> <p>Understanding exponents 11</p> <p>Discovering your roots 12</p> <p>Figuring out absolute value 12</p> <p>Finding Factors 13</p> <p>Generating factors 13</p> <p>Finding the greatest common factor (GCF) 14</p> <p>Finding Multiples 14</p> <p>Generating multiples 14</p> <p>Finding the least common multiple (LCM) 15</p> <p><b>Chapter 2: Evaluating Arithmetic Expressions</b><b> 17</b></p> <p>The Three E’s: Equations, Expressions, and Evaluations 18</p> <p>Equality for all: Equations 18</p> <p>Hey, it’s just an expression 19</p> <p>Evaluating the situation 19</p> <p>Putting the Three E’s together 19</p> <p>Following the Order of Operations 20</p> <p>Order of operations and the Big Four expressions 21</p> <p>Order of operations in expressions with exponents 24</p> <p>Order of operations in expressions with parentheses 25</p> <p><b>Chapter 3: Say What? Making Sense of Word Problems</b><b> 29</b></p> <p>Handling Basic Word Problems 30</p> <p>Turning word problems into word equations 30</p> <p>Plugging in numbers for words 33</p> <p>Solving More-Challenging Word Problems 34</p> <p>When numbers get serious 35</p> <p>Lots of information 36</p> <p>Putting it all together 37</p> <p><b>Chapter 4: Figuring Out Fractions</b><b> 41</b></p> <p>Reducing Fractions to Lowest Terms 42</p> <p>Multiplying and Dividing Fractions 42</p> <p>Multiplying numerators and denominators straight across 42</p> <p>Doing a flip to divide fractions 43</p> <p>Adding Fractions 43</p> <p>Finding the sum of fractions with the same denominator 44</p> <p>Adding fractions with different denominators 45</p> <p>Subtracting Fractions 47</p> <p>Subtracting fractions with the same denominator 47</p> <p>Subtracting fractions with different denominators 47</p> <p>Working with Mixed Numbers 48</p> <p>Converting between improper fractions and mixed numbers 49</p> <p>Multiplying and dividing mixed numbers 50</p> <p>Adding and subtracting mixed numbers 50</p> <p><b>Chapter 5: Deciphering Decimals</b><b> 57</b></p> <p>Performing the Big Four Operations with Decimals 57</p> <p>Adding decimals 58</p> <p>Subtracting decimals 59</p> <p>Multiplying decimals 59</p> <p>Dividing decimals 61</p> <p>Converting between Decimals and Fractions 63</p> <p>Changing decimals to fractions 64</p> <p>Changing fractions to decimals 66</p> <p><b>Chapter 6: Puzzling Out Percents</b><b> 69</b></p> <p>Understanding Percents Greater than 100% 70</p> <p>Converting to and from Percents, Decimals, and Fractions 70</p> <p>Going from percents to decimals 71</p> <p>Changing decimals into percents 71</p> <p>Switching from percents to fractions 71</p> <p>Turning fractions into percents 72</p> <p>Solving Percent Problems 73</p> <p>Figuring out simple percent problems 74</p> <p>Deciphering more-difficult percent problems 75</p> <p>Applying Percent Problems 76</p> <p>Identifying the three types of percent problems 76</p> <p>Introducing the percent circle 77</p> <p><b>Chapter 7: Fraction, Decimal, and Percent Word Problems</b><b> 83</b></p> <p>Adding and Subtracting Parts of the Whole 83</p> <p>Sharing a pizza: Fractions 84</p> <p>Buying by the pound: Decimals 84</p> <p>Splitting the vote: Percents 85</p> <p>Multiplying Fractions in Everyday Situations 86</p> <p>Buying less than advertised 86</p> <p>Computing leftovers 87</p> <p>Multiplying Decimals and Percents in Word Problems 88</p> <p>Figuring out how much money is left 88</p> <p>Finding out how much you started with 89</p> <p>Handling Percent Increases and Decreases in Word Problems 91</p> <p>Raking in the dough: Finding salary increases 91</p> <p>Earning interest on top of interest 92</p> <p>Getting a deal: Calculating discounts 93</p> <p><b>Chapter 8: Using Variables in Algebraic Expressions</b><b> 95</b></p> <p>Variables: X Marks the Spot 95</p> <p>Expressing Yourself with Algebraic Expressions 96</p> <p>Evaluating algebraic expressions 97</p> <p>Coming to algebraic terms 99</p> <p>Making the commute: Rearranging your terms 99</p> <p>Identifying the coefficient and variable 100</p> <p>Identifying similar terms 101</p> <p>Considering algebraic terms and the Big Four operations 102</p> <p>Simplifying Algebraic Expressions 106</p> <p>Combining similar terms 106</p> <p>Removing parentheses from an algebraic expression 107</p> <p><b>Chapter 9: X’s Secret Identity: Solving Algebraic Equations</b><b> 113</b></p> <p>Understanding Algebraic Equations 114</p> <p>Using x in equations 114</p> <p>Four ways to solve algebraic equations 115</p> <p>Checks and Balances: Solving for X 117</p> <p>Striking a balance 117</p> <p>Using the balance scale to isolate x 118</p> <p>Rearranging Equations to Isolate X 119</p> <p>Rearranging terms on one side of an equation 120</p> <p>Moving terms to the other side of the equal sign 120</p> <p>Removing parentheses from equations 122</p> <p>Using cross-multiplication to remove fractions 124</p> <p><b>Chapter 10: Decoding Algebra Word Problems</b><b> 127</b></p> <p>Using a Five-Step Approach 128</p> <p>Declaring a variable 128</p> <p>Setting up the equation 129</p> <p>Solving the equation 130</p> <p>Answering the question 131</p> <p>Checking your work 131</p> <p>Choosing Your Variable Wisely 131</p> <p>Solving More-Complex Algebra Problems 133</p> <p><b>Chapter 11: Geometry: Perimeter, Area, Surface Area, and Volume</b><b> 135</b></p> <p>Closed Encounters: Understanding 2-D Shapes 136</p> <p>Circles 136</p> <p>Polygons 136</p> <p>Adding Another Dimension: Solid Geometry 137</p> <p>The many faces of polyhedrons 137</p> <p>3-D shapes with curves 138</p> <p>Measuring Shapes: Perimeter, Area, Surface Area, and Volume 139</p> <p>2-D: Measuring on the flat 139</p> <p>Spacing out: Measuring in three dimensions 147</p> <p><b>Chapter 12: Picture It! Graphing Information</b><b> 151</b></p> <p>Examining Three Common Graph Styles 152</p> <p>Bar graph 152</p> <p>Pie chart 153</p> <p>Line graph 154</p> <p>Using Cartesian Coordinates 155</p> <p>Plotting points on a Cartesian graph 156</p> <p>Drawing lines on a Cartesian graph 157</p> <p>Solving problems with a Cartesian graph 159</p> <p><b>Chapter 13: Ten Essential Math Concepts</b><b> 163</b></p> <p>Playing with Prime Numbers 163</p> <p>Zero: Much Ado about Nothing 164</p> <p>Delicious Pi 164</p> <p>Equal Signs and Equations 165</p> <p>The Cartesian Graph 165</p> <p>Relying on Functions 166</p> <p>Rational Numbers 166</p> <p>Irrational Numbers 167</p> <p>The Real Number Line 167</p> <p>Exploring the Infinite 168</p> <p>Index 169 </p>
<p><b>Mark Zegarelli</b> is a math tutor and author of several books, including<i> Basic Math & Pre-Algebra For Dummies.</i>
<ul> <li>The "must-know" formulas and equations</li> <li>Exactly what you need to know to ace pre-algebra</li> <li>Concise coverage of key topics</li> </ul> <p><b>Your practical primer on pre-algebra</b> <p>This useful and friendly guide focuses on critical concepts taught in a typical pre-algebra course — from fractions, decimals, and percents to standard formulas and simple variable equations. Learn how to turn words into numbers and use "x" in algebraic equations to solve word problems. Get the lowdown on the essential formulas you need to solve for perimeter, area, surface area, and volume. <i>Pre-Algebra Essentials For Dummies</i> is perfect for cramming, homework help, or as a reference for parents and tutors helping students study for exams. <p><b>Inside...</b> <ul> <li>How to find the greatest common factor and least common multiple</li> <li>Tips for working with fractions</li> <li>Evaluate and simplify algebraic expressions</li> <li> Essential formulas explained</li> <li>Convert between fractions and decimals</li> <li>Help for understanding graphs and charts</li> </ul>

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