INTEGERS Multiplying Solve Isabella owes 6 to each

INTEGERS Multiplying

Solve Isabella owes $6 to each of 4 friends. How much money does she owe? Solution Owing $6 can be represented by -6. Thus the problem becomes: -6 x +4 = -24 or (-6) (+4) = -24 Isabella owes $24

MULTIPLYING INTEGERS Rules to Multiplying Integers Example Positive x Positive = Positive 2 x 3=6 Positive x Negative = Negative 2 x -3 = -6 Negative x Positive = Negative -2 x 3 = -6 Negative x Negative = Positive -2 x -3 = 6 Note: ØWhen you multiply a positive integer by a negative integer, the product is a negative integer. ØWhen you multiply two negative integers, the product is a positive integer.

MULTIPLYING INTEGERS 1. 2. 3. 4. YOUR TURN…. 8 x 9 = 72 -9 x -3= 27 -5 x 10 = -50 6 x -7 = -42

INTEGERS Dividing

Solve Maddie owes the library $15. Each of 3 friends will help her pay off her debt. How much will each friend pay? Solution Owing $15 can be represented by -15. Thus the problem becomes: -15 ÷ +3 = -5 Each of Maddie’s friends will pay $5

DIVIDING INTEGERS Rules to Dividing Integers Example Positive ÷ Positive = Positive 14 ÷ 7=2 Positive ÷ Negative = Negative 14 ÷ -7 = - 2 Negative ÷ Positive = Negative ÷ Negative = Positive -14 ÷ 7=- 2 -14 ÷ -7 = 2 Note: ØWhen you divide a positive integer by a negative integer, the quotient is a negative integer. ØWhen you divide two negative integers, the quotient is a positive integer.

DIVIDING INTEGERS 1. 2. 3. 4. YOUR TURN…. 72 ÷ 9 8 = 9 -27 ÷ - -10 3= -6 -50 ÷ 5 = 42 ÷ -7 =

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