DIRECTED NUMBERS

DIRECTED NUMBERS


The numbers which have a direction and a size are called directed numbers.

Multiplication and Division of Integers


MULTIPLICATION

RULE 1: The product of a positive integer and a negative integer is negative.

RULE 2: The product of two positive integers is positive.

RULE 3: The product of two negative integers is positive.

DIVISION

RULE 1: The quotient of a positive integer and a negative integer is negative
RULE 2: The quotient of two positive integers is positive.


RULE 3: The quotient of two negative integers is positive.

SUMMARY OF MULTIPLICATION AND DIVISION RULES
# If the signs are different the answer is negative.
# If the signs are alike the answer is positive
#


example (Multiplication)

Rule 1: 1. (+4) x (-2) = -8
2. (-2) x (+5) = -10

Rule 2: 1. (+6) x (+8) = +48
2. (+6) x (+2) = +12

Rule 3: 1. (-6) x (-8) = +48
2. (-2) x (-4) = +8

example ( Division):

Rule 1: 1. (-8) / (+4) = -2

2. (-12) / (+6) = -2

Rule 2: 1. (+6) / (-3) = -2

2. (+24) / (-6) = -4

Rule 3: 1. (+9) / (+3) = +3

2. (+16) / (+4) = +4

Rule 4: 1. (-6) / (-2) = +3

2. (-42) / (-7) = +6