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Do Now 10/11/11 Copy HW in your planner. Copy HW in your planner.  Text p. 68, #2-56 evens, 63 & 64 Be ready to copy POTW #5 Be ready to copy POTW #5

Objective SWBAT multiply and divide integers

Section 2-4 “Multiplying and Dividing Integers” Rule #1 The product or quotient of two integers with the same sign is always POSITIVE! 8 x 3 = · (-7) = ÷ 6 = 3

Rule #2 The product or quotient of two integers with different signs is always NEGATIVE! (-9)(3) = · (-7) = ÷ 3 = -2 Section 2.4 “Multiplying and Dividing Integers”

Negative or Positive? Without solving the problem, decide whether the product or quotient will be positive or negative. 17(-2) negative -13 ÷ 11 negative -14 ÷ (-14) positive -73 · (-84) positive

Zero or Undefined? Without solving the problem, decide whether the product or quotient will be zero or undefined. 17(0) zero 0 ÷ 11 zero -14 ÷ 0 undefined 0 · (-84) zero

Practice 1). 8 · 9 = 2). -8 · 10 = 3). 0(-4) = 4). (-7)(-7) = 5). (-4)3 = ). 8 ÷ (-2) = 7). -80 ÷ (-10) = 8). -8 / (-4) = 9) ÷ 0 = 10) undefined undefined 8

Evaluate the Expression -4(3)(-5) -12(-5) mn m = 3 and n = -5 Substitute

Evaluate the Expression PEMDAS x -8y Grouping symbol [(-8)(-9)] ÷ (-12) 72 ÷ (-12) -6 x = -12 and y = -9 Substitute

Practice xyz xyz Evaluate the expressions when x = -3, y = -5, z = 7 (-3)(-5)(7) (-3)(-5)(7) 15 · (7) 15 · (7)

Homework Text p. 68, #2-56 evens, 63 & 64 NJASK7 Prep

“Real Number” Cards Red cards = Negative Black cards = Positive Jack = 11, Queen = 12, King =13, Ace = 1 or 14 Dealer deals each player 2 cards. The player with the highest answer gets all the cards from that round. The player with the most cards at the end of the deck wins!  Multiply 1 st two cards together.