 # Transparency 4 Click the mouse button or press the Space Bar to display the answers.

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Transparency 4 Click the mouse button or press the Space Bar to display the answers.

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Example 4-5b Objective Multiply Integers

Example 4-5b Vocabulary None

Example 4-5b Multiply Integers 1.Same Sign Positive Answer 2.Different Signs Negative Answer 3  4 = 12 -3  -4 = 12 3  -4 = -12 -3  4 = -12

Lesson 4 Contents Example 1Multiply Integers with Different Signs Example 2Multiply Integers with Different Signs Example 3Multiply Integers with Same Signs Example 4Multiply Integers with Same Sings Example 5Use Integers to Solve a Problem

Example 4-1a Answer: Opposite Signs Multiply numbers without signs 9  6 54 Opposite signs, negative answer - Write problem 9  ( - 6 ) Draw arrows to signs Identify signs 1/5 Find 9  (-6)

Example 4-1b Answer: –28 1/5 Find 4  (-7)

Example 4-2a Answer: Opposite Signs Multiply numbers without signs 5  7 35 - Write problem - 5  7 Draw arrows to signs Identify signs Opposite signs, negative answer 2/5 Find - 5  7

Example 4-2b Answer: –24 2/5 Find - 8  3

Example 4-3a Answer: Same Signs Multiply numbers without signs 7  9 63+ Write problem 7  9 Draw arrows to signs Identify signs Same signs, positive answer 3/5 Find 7  9

Example 4-3b Answer: 20 3/5 Find 5  4

Example 4-4a Answer: Same Signs Multiply numbers without signs 4  8 32+ Write problem - 4  ( - 8 ) Draw arrows to signs Identify signs Same signs, positive answer 4/5 Find - 4  (- 8)

Example 4-4b Answer: 14 4/5 Find - 2  (- 7)

Example 4-5a ELEVATORS An elevator takes passengers from the ground floor of a mall down to the underground parking garage. If it travels at a rate of 5 feet per second, where will it be in relation to the ground floor after 2 seconds? - 5  2 5/5 Determine process to use “Rate” refers to distance multiplied by time Identify distance Elevator is going down so number is negative Identify time

Example 4-5a Answer: Opposite Signs Multiply numbers without signs 5  2 10- - 5  2 Draw arrows to signs Identify signs Opposite signs, negative answer 5/5 If it travels at a rate of 5 feet per second, Add dimensional analysis feet Distance is in feet

Example 4-5b INVESTMENTS Mr. Green has invested in a stock whose price is decreasing at a rate of \$3 per day. What will be the change in the price of the stock after 5 days? Answer: – \$15 * 5/5

End of Lesson 4 Assignment Lesson 8:4Multiplying Integers11 - 31 All

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