9/9/14 – Real Number Multiplicaiton & Divison

DO NOW

HERO PROBLEM (impress me): 27 + -15 - - 9 – 4 =

1). -4 -14 = 2). 8 - -13 =

3). -9 - - 15 = 4). 6 – 15 =

5). 21 - - 19 = 6). -37 – - 19 =

IF MR. NAUEN GETS HW FOR THE REST OF THE WEEK

FROM EVERY (AND I MEAN EVERY) MEMBER OF CLASS THIS WEEK, HE WILL WEAR

MAX’S UGLY RED SOX HAT ON MONDAY IN CLASS.

Class Challenge

What are we doing Today

OBJECTIVE: WE WILL be able to multiply and divide positive and negative real numbers.

ESSENTIAL UNDERSTANDING: Multiplying and dividing positive and negative numbers is easy – there is just one rule to remember!!

AP

Signs when multiplying and dividing

THE BIG RULE (when multiplying and dividing):

If the signs are the same, the answer is always positive

If the signs are different, the answer is always negative

AP

Let’s Apply This Together

1). -6 x 7 = 2). 8 x 8 =

3). -9 x -5 = 4). 3 x -8 =

5). -11 x 3 = 6). -4 x -6 =

AP

Let’s Apply This Together

1). 12 ÷ - 4 = 2). -36/6 =

3). 8 ÷ 2 = 4). -15/-3 =

5). -21 ÷ 3 = 6). -40/8 =

AP

Time for Positive/Negative Integer Cards

1). We are playing with mixed card decks with only black and red number cards (no aces or face cards).

2). The dealer will give you two cards. The black cards are positive; the red are negative.

3). Multiply Them! When you succeed, keep the cards and ask for two more.

4). He/She with the most cards wins!