Basic Math and Pre-Algebra For Dummies Education Bundle
Format: PDF / Kindle (mobi) / ePub
Get the skills you need to solve problems and equations and be ready for algebra class. Whether you're a student preparing to take algebra or a parent who wants to brush up on basic math, this fun, friendly guide has the tools you need to get in gear. From positive, negative, and whole numbers to fractions, decimals, and percents, you'll build necessary skills to tackle more advanced topics, such as imaginary numbers, variables, and algebraic equations. Look inside and discover topics such as:
Understanding fractions, decimals, and percents
- Unraveling algebra word problems
- Grasping prime numbers, factors, and multiples
- Working with graphs and measures
- Solving single and multiple variable equations
Want more? Let Basic Math & Pre-Algebra Workbook For Dummies help you out even further. You'll find 280+ pages with hundreds of practice problems featuring ample workspace to work out the problems. Each problem includes a step-by-step answer set to identify where you went wrong (or right). This helpful workbook will get you up to speed with basic math and pre-algebra before you know it!
math? The answer to this question would probably take 20 books this size, but solving the problem can begin right here. I humbly ask you to put aside any doubts. Remember, just for a moment, an innocent time — a time before math-inspired panic attacks or, at best, induced irresistible drowsiness. In this book, I take you from an un-derstanding of the basics to the place where you’re ready to enter any algebra class and succeed. About This Book Somewhere along the road from counting to
fraction can never be 0. Fractions with 0 in the denominator are undefined — that is, they have no mathematical meaning. Remember from earlier in this chapter that placing a number in the denominator is similar to cutting a cake into that number of pieces. You can cut a cake into two, or ten, or even a million pieces. You can even cut it into one piece (that is, don't cut it at all). But you can't cut a cake into zero pieces. For this reason, putting 0 in the denominator — much like lighting an
order, under the two fractions. The larger number is always under the larger fraction. In this case, 14 goes under and 12 goes under . The number 14 is greater than 12, so is greater than . For example, suppose you want to find out which of the following three fractions is the greatest: Cross-multiplication works only with two fractions at a time, so pick the first two — and — and then cross-multiply: Because 27 is greater than 25, you know now that is greater than . So you can throw out .
away, you prepare yourself for a short walk. And if I tell you that it's 10 miles away, you head for the car. But what do you do with the information that the beach is 3 kilometers away? Similarly, if I tell you that the temperature is 85°F, you'll probably wear a bathing suit or shorts. And if I tell you it's 40°F, you'll probably wear a coat. But what do you wear if I tell you that the temperature is 25°C? In this section, I give you a few rules of thumb to estimate metric amounts. In each
you want to evaluate this expression: To evaluate it, you need the values of all three variables: The first step is to substitute the equivalent value for each of the three variables wherever you find them: Now use the rules for order of operations from Chapter 5. Begin by evaluating the exponent 32: Next, evaluate the multiplication from left to right (if you need to know more about the rules for multiplying negative numbers, check out Chapter 4): = 27 + (–12) – (–30) Now all