Basic Mathematics for College Students

180 Chapter 2 The Integers

1. a. b. c. d. 2. a. 9 b. 6 c. 43 d. 20 3. a.undefined
   b. 0 4.The price was reduced by $120 each month.

 9  7  24  60

ANSWERS TO SELF CHECKS

Using Your CALCULATOR Division with Negative Numbers

The Bureau of Labor Statistics estimated that the United States lost 162,000

auto manufacturing jobs (motor vehicles and parts) in 2008. Because the

jobs were lost, we write this as. To find the average number of

manufacturing jobs lost each month, we divide: We can use a

calculator to perform the division.

Reverse entry: 162000 12

Direct entry: 162000 12

The average number of auto manufacturing jobs lost each month in 2008 was

13,500.

 () ENTER  13500

/  

162,000 12.

162,000

VOCABULARY

Fill in the blanks.

1. In the division problems shown below, label the
   dividend, divisor,and quotient.

12  (4)  3

12

 4

 3

7. Fill in the blanks.
   To divide two integers, divide their absolute values.
   a. The quotient of two integers that have the same
   (like) signs is.
   b. The quotient of two integers that have different
   (unlike) signs is.


8. If a divisor has ending zeros, we can simplify the
   division by removing the same number of ending
   zeros in the divisor and dividend. Fill in the blank:


9. Fill in the blanks.
   a. If 0 is divided by any nonzero integer, the quotient
   is.
   b. Division of any nonzero integer by 0 is.


10. What operation can be used to solve problems that
    involve forming equal-sized groups?


11. Determine whether each statement is always true,
    sometimes true, or never true.
    a. The product of a positive integer and a negative
    integer is negative.
    b. The sum of a positive integer and a negative
    integer is negative.
    c. The quotient of a positive integer and a negative
    integer is negative.


12. Determine whether each statement is always true,
    sometimes true, or never true.
    a. The product of two negative integers is positive.
    b. The sum of two negative integers is negative.
    c. The quotient of two negative integers is negative.

2,400 60  240 

SECTION 2.5 STUDY SET

  







2. The related statement for is
   .


3. is division 0 and is division 0.


4. Division of a nonzero integer by 0, such as is
   .

CONCEPTS

5. Write the related multiplication statement for each
   division.

a. b. c.

6. Using multiplication, check to determine whether
    720  45  12.

0

 15

 36 (6) 6  0

 25

5

 5

 3

0

,

0

 3

 0

 3

0

2(3) 6

 6

3

 2