Читать книгу Basic Math & Pre-Algebra All-in-One For Dummies (+ Chapter Quizzes Online) - Mark Zegarelli - Страница 54

IN THIS CHAPTER

Working with the Big Four operations (addition, subtraction, multiplication, and division)

Identifying which operations are inverses of each other

Knowing the operations that are commutative, associative, and distributive

Performing the Big Four operations on negative numbers

Using four symbols for inequality

Understanding exponents, roots, and absolute values

In this chapter, you work with negative numbers — that is, numbers that are less than zero. To begin, you see how negative numbers arise when you subtract a smaller number minus a greater one. Next, you discover how to negate a number by flipping its sign. You also work with absolute value, which is the positive value of a number.

When you’re comfortable working with negative numbers, you begin to use them with the Big Four operations — addition, subtraction, multiplication, and division.