Basic Math and Pre-Algebra Workbook For Dummies von Zegarelli, Mark (eBook)

• Erscheinungsdatum: 20.03.2017
• Verlag: For Dummies
eBook (ePUB)
13,99 €
inkl. gesetzl. MwSt.

Online verfügbar

Basic Math and Pre-Algebra Workbook For Dummies

Once you get comfortable with the rules and operations, math takes on a whole new dimension. Curiosity replaces anxiety, and problems start feeling like puzzles rather than hurdles. All it takes is practice. Basic Math & Pre-Algebra Workbook For Dummies is your ultimate math coach, with hundreds of guided practice practice problems to help you break through the math barrier. Mark Zegarelli is a math and test prep teacher who has written a wide variety of basic math and pre-algebra books in the For Dummies series.

Produktinformationen

Format: ePUB
Seitenzahl: 312
Erscheinungsdatum: 20.03.2017
Sprache: Englisch
ISBN: 9781119357520
Verlag: For Dummies
Größe: 4733 kBytes
Weiterlesen weniger lesen

Basic Math and Pre-Algebra Workbook For Dummies

Chapter 1

IN THIS CHAPTER

Understanding how place value turns digits into numbers

Rounding numbers to the nearest ten, hundred, or thousand

Calculating with the Big Four operations: Adding, subtracting, multiplying, and dividing

Getting comfortable with long division

In this chapter, I give you a review of basic math, and I do mean basic. I bet you know a lot of this stuff already. So, consider this a trip down memory lane, a mini-vacation from whatever math you may be working on right now. With a really strong foundation in these areas, you'll find the chapters that follow a lot easier.

First, I discuss how the number system you're familiar with - called the Hindu-Arabic number system (or decimal numbers) - uses digits and place value to express numbers. Next, I show you how to round numbers to the nearest ten, hundred, or thousand.

After that, I discuss the Big Four operations: adding, subtracting, multiplying, and dividing. You see how to use the number line to make sense of all four operations. Then I give you practice doing calculations with larger numbers. To finish up, I make sure you know how to do long division both with and without a remainder.

Some math books use a dot (·) to indicate multiplication. In this book, I use the more familiar times sign .
Getting in Place with Numbers and Digits

The number system used most commonly throughout the world is the Hindu-Arabic number system. This system contains ten digits (also called numerals ), which are symbols like the letters A through Z . I'm sure you're quite familiar with them:

1

2

3

4

5

6

7

8

9

0

Like letters of the alphabet, individual digits aren't very useful. When used in combination, however, these ten symbols can build numbers as large as you like using place value. Place value assigns each digit a greater or lesser value depending upon where it appears in a number. Each place in a number is ten times greater than the place to its immediate right.

Although the digit 0 adds no value to a number, it can act as a placeholder. When a 0 appears to the right of at least one nonzero digit, it's a placeholder. Placeholders are important for giving digits their proper place value. In contrast, when a 0 isn't to the right of any nonzero digit, it's a leading zero. Leading zeros are unnecessary and can be removed from a number.

Q. In the number 284, identify the ones digit, the tens digit, and the hundreds digit.

A. The ones digit is 4, the tens digit is 8, and the hundreds digit is 2.

Q. Place the number 5,672 in a table that shows the value of each digit. Then use this table and an addition problem to show how this number breaks down digit by digit.

A.

Millions

Hundred Thousands

Ten Thousands

Thousands

Hundreds

Tens

Ones

5

6

7

2

The numeral 5 is in the thousands place, 6 is in the hundreds place, 7 is in the tens place, and 2 is in the ones place, so here's how the number breaks down:

Q. Place the number 040,120 in a table that shows the value of each digit. Then use this table to show how this number breaks down digit by digit. Which 0s are placeholders, and which are leading zeros?

A.

b

Weiterlesen weniger lesen

HOFER life eBooks: Die perfekte App zum Lesen von eBooks.

Hier findest du alle deine eBooks und viele praktische Lesefunktionen.