# 1: Real Numbers and Their Operations

- Page ID
- 18332

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- 1.3: Multiplying and Dividing Integers
- The result of multiplying real numbers is called the product and the result of dividing is called the quotient. A positive number multiplied by a negative number is negative. A negative number multiplied by a negative number is positive. Multiplication is commutative and division is not. When simplifying, work the operations of multiplication and division in order from left to right.

- 1.4: Fractions
- A fraction is a real number written as a quotient, or ratio, of two integers a and b , where b≠0 .

- 1.5: Review of Decimals and Percents
- In this section, we provide a brief review of the decimal system. A real number in decimal form, a decimal consists of a decimal point, digits (0 through 9) to the left of the decimal point representing the whole number part, and digits to the right of the decimal point representing the fractional part. The digits represent powers of 10 as shown in the set {…,1,000,100,10,1,1/10,1/100,1/1,000,…}.