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

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.

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