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Five-Minute Check (over Lesson 25)
Main Idea
Key Concept: Multiply Integers with Different Signs
Example 1: Multiple Integers with Different Signs
Example 2: Multiple Integers with Different Signs
Key Concept: Multiply Integers with Same Sign
Example 3: Multiply Integers with the Same Sign
Example 4: Multiply Integers with the Same Sign
Example 5: Multiply Integers with the Same Sign
Example 6: Use Integers to Solve a Problem
Example 7: Evaluate Expressions
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Multiply integers.
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Multiply Integers with Different Signs
Find 5(4).
Answer: 20
5(4) = 20 The integers have differentsigns. The product isnegative.
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1. A
2. B
3. C
4. D
A B C D
0% 0%0%0%
A. 15
B. 2
C. 2
D. 15
Find 3(5).
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Multiply Integers with Different Signs
Find 3(9).
Answer: 27
3(9) = 27 The integers have differentsigns. The product is
negative.
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1. A
2. B
3. C
4. D
A B C D
0% 0%0%0%
A. 35
B. 2
C. 12
D. 35
Find 5(7).
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1. A
2. B
3. C
4. D
A B C D
0% 0%0%0%
A. 28
B. 11
C. 11
D. 28
Find 4(7).
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Find (8)2.
Answer: 64
Multiply Integers with the Same Sign
(8)2 = (8)(8) There are two factors of 8.
= 64 The product is positive.
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1. A
2. B
3. C
4. D
A B C D
0% 0%0%0%
A. 25
B. 10
C. 10
D. 25
Find (5)2.
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Find 2(5)(6).
Answer: 60
Multiply Integers with the Same Sign
2(5)(6) =[2(5)](6)
Associative Property
= 10(6)2(5) = 10
= 60
The product isnegative.
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1. A
2. B
3. C
4. D
A B C D
0% 0%0%0%
A. 84
B. 14
C. 14
D. 84
Find 7(3)(4).
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Use Integers to Solve a Problem
MINES A mine elevator descends at a rate of300 feet per minute. How far below the earthssurface will the elevator be after 5 minutes?
If the elevator descends 300 feet per minute, then after5 minutes, the elevator will be at 300(5) or 1,500 feet.Thus, the elevator will descend to 1,500 feet.
Answer: After five minutes, the elevator will be1,500 feet below the earths surface.
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1. A
2. B3. C
4. D
A B C D
0% 0%0%0%
A. $468
B. $468
C. $84
D. $84
RETIREMENT Mr. Rodriguez has $78 deducted fromhis pay every month and placed in a savings accountfor his retirement. What integer represents a changein his savings account for these deductions after sixmonths?
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ALGEBRA Evaluate abc ifa = 3, b = 5, and c= 8.
Answer: 120
Evaluate Expressions
abc = (3)(5)(8) Replace a with 3, b with 5,and cwith 8.
= (15)(8) Multiply 3 and 5.
= 120 Multiply 15 and 8.
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End of the Lesson
Pg. 110-111, # 14-36even, 38-44, 46-48
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Five-Minute Check (over Lesson 25)
Image Bank
Math Tools
Adding Integers
Comparing and Ordering Integers
Subtracting Positive and Negative Integers
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1. A
2. B3. C
4. D
A. 9
B. 1
C. 1
D. 9
Find 4 5.
(over Lesson 2-5)
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1. A
2. B3. C
4. D
A B C D
0% 0%0%0%
(over Lesson 2-5)
A. 48
B. 20
C. 20
D. 48
Find 14 34.
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1. A
2. B3. C
4. D
A B C D
0% 0%0%0%
(over Lesson 2-5)
A. 53
B. 37
C. 37
D. 53
Find 45 (8).
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1. A
2. B3. C
4. D
A B C D
0% 0%0%0%
(over Lesson 2-5)
A. 4
B. 2
C. 2
D. 4
Evaluate c b forb = 3 and c= 1.
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1. A
2. B3. C
4. D
A B C D
0% 0%0%0%
(over Lesson 2-5)
A. 7
B. 1
C. 1
D. 7
What is 4 subtracted from 3?
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