1. Lesson 1-2 Multiplication & Division of Real Numbers
Objectives:7N6
Do not write
Multiply positive & negative numbers
Divide positive & negative numbers
Recognize division by zero as impossible

2. Reciprocal is the “flip” of the number
Rules of Multiplication & Division
Both numbers have same sign → product/quotient is positive
Numbers have opposite sign → product/quotient is negative
Property of Multiplicative Inverses
For every number, a, there is exactly one number, b, for which
a ● b = 1 (b must be the reciprocal of a)
Reciprocal is the “flip” of the number
Division Theorem
Division can be expressed as:
a ÷ b
Division by Zero: Zero cannot be the denominator (divisor). This is called undefined.

3. Examples
Multiply
8(-3)
-9( )
-24 27 2
-35 18
Undefined (not possible)