Question

she wants me to show work, its called a drop box i have to do it show work and send it to her by email


Mentally estimate the sum by rounding to the first digit, then add to get the exact answer. See

Example 1.

1. 328583+726−−−−−

2. 671982+57−−−−

3. 791+1,000+52

4. 5,784+21,872+26,215

Add the integers. See Examples 4-5.

5. −42+36

6. −283+375

7. −4,216+(−3,972)

Subtract and check the difference. See Example 2.

8. 5 5−3 6−−−−−

9. 3 0 8−2 7 5−−−−−−

10. 5,409−2,176

Subtract the integers. See Example 6.

11. 18−(−3)

12. −12−(5)

13. −5−(−17)∗

14. 37−41

Multiply and check the product. See Examples 7-9.

15. 730×60−−−−−−

16. 904×24−−−−−−

17. 1,005 by 89

Multiply the integers. See Examples 11-12.

18. (−3)(46)

19. (32)(−15)

20. (−64)(−83)

21. (−$82,916)(7)

. 2,772÷6

2. 6,744÷24

3. 14,305÷47

4. 1,263÷15

See Example 13.

5. The Gap purchased 5,184 pairs of blue jeans to be distributed evenly among 324 stores. How many pairs were sent to each store?

6. Auto Zone purchased 26,560 cans of car wax on a special manufacturer's offer. It distributed a case of 64 cans to each store. How many stores got the special offer?

See Example 15.

7. Citigroup reported an annual loss of −$27,684 million. What is the average loss for each of the 12 months in the year?

8. Conoco Phillips reported an annual loss of −$16,998,000,000. What is the average loss for each of the 12 months in the year?

Divide. See Example 16.

9. 834,000÷600

10. 14,560,000÷7,000

Multiply. Write products as proper fractions or mixed numbers in lowest terms. See Examples 1–2.

1. 37×58

2. 49×38

3. 314×1513

4. 119×3

5. 225×1521

6. The outside width of a boxed cooktop is 238 feet, and a shipment of boxed cooktops is placed in a 45-foot trailer. How many feet will 16 cooktop boxes require?

7. Computer boxes are 213 feet high. How high is a stack of 14 computer boxes?


Stop and Check

Find the reciprocal. See Example 3.

1. 512

2. 32

3. 718

Divide. Write the quotient as a proper fraction or mixed number in lowest terms. See Examples 4–5.

4. 78÷34

5. 225÷2110

6. 338÷9

7. See Example 4. Kisha stacks lumber in a storage bin that is 72 inches in height. If she stores 34-inch-thick plywood in the bin, how many sheets can she expect to fit in the bin?


Stop and Check

Divide.

See Example 5.

1. 100.80÷15

See Example 6.

2. Round the quotient to tenths: 358.26÷23

See Example 7.

3. 78÷100

See Example 8.

4. Round the quotient to tenths: 12.97÷3.8

5. Round the quotient to hundredths: 103.07÷5.9

6. Gwen Hilton's gross weekly pay is $716.32 and her hourly pay is $19.36. How many hours did she work in the week?

7. The Denver Post reported that Wal-Mart would sell 42-inch Hitachi plasma televisions in a 4-day online special for $1,198 each. If Wal-Mart had paid $648,000,000 for a million units, how much did each unit cost Wal-Mart? See Example 9.

1. 6.005+0.03+924+3.9

2. 82+5,000.1+101.703

3. $21.13+$42.78+$16.39

4. $203.87+$1,986.65+$3,047.38

Subtract. See Example 1.

5. 407.96−298.39

6. 500.7 from 8,097.125

7. $468.39−$223.54

8. $21.65−$15.96

9. $52,982.97−$45,712.49

10. $38,517−$21,837.46

Multiply. See Examples 2–4.

11. 19.7

12. 0.0321×10

13. 73.7×0.02

14. 43.7×1.23

15. 5.03×0.073

16. 642×$12.98

Divide and round to the nearest hundredth if necessary. See Examples 5–8.

17. 123.72÷12

18. 35589.06

19. 0.350.0084

20. 1,482.97÷1.7

21. 32.73÷10

22. 0.014÷100

23. 483÷10

24. 315.7÷1,000

APPLICATIONS

25. Kathy Mowers purchased items costing $14.97, $28.14, $19.52, and $23.18. How much do her purchases total?

26. Jim Roznowski submitted a travel claim for meals, $138.42; hotel, $549.78; and airfare, $381.50. Total his expenses.


27. Joe Gallegos purchased a calculator for $12.48 and paid with a $20 bill. How much change did he get?

28. Martisha Jones purchased a jacket for $49.95 and a shirt for $18.50. She paid with a $100 bill. How much change did she receive?

29. Laura Voight earns $8.43 per hour as a telemarketing employee. One week she worked 28 hours. What was her gross pay before any deductions?

30. Cassie James works a 26-hour week at a part-time job while attending classes at Southwest Tennessee Community College. Her weekly gross pay is $213.46. What is her hourly rate of pay?

31. Calculate the cost of 1,000 gallons of gasoline if it costs $2.47 per gallon. See Example 3.

32. A buyer purchased 2,000 umbrellas for $4.62 each. What is the total cost?

33. All the employees in your department are splitting the cost of a celebratory lunch, catered at a cost of $142.14. If your department has 23 employees, will each employee be able to pay an equal share? How should the catering cost be divided?

34. AT&T offers a prepaid phone card for $5. The card provides 20 minutes of long-distance phone service. Find the cost per minute. See Example 9.


How to Convert a decimal to a fraction

1. Find the denominator: Write 1 followed by as many zeros as there are places to the right of the decimal point.



Write 0.8 as a fraction.

Denominator=10

2. Find the numerator: Use the digits without the decimal point.



810

3. Reduce to lowest terms and write as a whole or mixed number if appropriate.




Stop and Check

Write as a fraction or mixed number, and write in simplest form.

See Example 1.

1. 0.7

2. 0.32

3. 0.07

See Example 2.

4. 2.087

5. 23.41
1. 35

2. 78

See Example 4.

3. 512

4. Write 56 as a decimal in hundredths with the remainder expressed as a fraction.

See Example 5.

5. 7 45

6. 8 47