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Objective Multiply Integers Example 4-5b

Vocabulary None Example 4-5b

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

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

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

Answer: –28 1/5 Example 4-1b

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

Answer: –24 2/5 Example 4-2b

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

Answer: 20 3/5 Example 4-3b

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

Answer: 14 4/5 Example 4-4b

ELEVATORS An elevator takes passengers from the ground floor of a shopping 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? To find the location of the elevator after 2 seconds, you can multiply 2 by the amount of change per second, –5 feet. 2  ( - 5 ) 5/5 Example 4-5a

Multiply numbers without signs - 10 2  ( - 5 ) Write problem Draw arrows to signs Opposite Signs Identify signs 2  5 Multiply numbers without signs - 10 Opposite signs , negative answer Answer: –10 feet 5/5 Example 4-5a

* 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 Example 4-5b

End of Lesson 4