Basic Mathematics for College Students

1.2 Adding Whole Numbers 15

105. SPEED OF LIGHT The speed of light is
     983,571,072 feet per second.
     a. In what place value column is the 5?

b. Round the speed of light to the nearest ten

million. Give your answer in standard notation

and in expanded notation.

c. Round the speed of light to the nearest hundred

million. Give your answer in standard notation

and in written-word form.

106. CLOUDS Graph each cloud type given in the table
     at the proper altitude on the vertical number line in
     the next column.

Thousands

of kwh

10

2

3

56

7

8

9

4

90

8

7

54

3

2

1

6

10

2

3

5 6

7

8

9

4

90

8

7

54

3

2

1

6

Hundreds

of kwh

Tens

of kwh

Units

of kwh

107. Explain how you would round 687 to the nearest ten.


108. The houses in a new subdivision are priced “in the
     low 130s.” What does this mean?
     109.A million is a thousand thousands. Explain why this
     is so.


109. Many television infomercials offer the viewer
     creative ways to make a six-figure income. What is a
     six-figure income? What is the smallest and what is
     the largest six-figure income?


110. What whole number is associated with each of the
     following words?
     duo decade zilch a grand four score
     dozen trio century a pair nil


111. Explain what is wrong by reading 20,003 as twenty
     thousand and three.

WRITING

40,000 ft

35,000 ft

30,000 ft

25,000 ft

20,000 ft

15,000 ft

10,000 ft

5,000 ft

0 ft

Cloud type Altitude (ft)

Altocumulus 21,000

Cirrocumulus 37,000

Cirrus 38,000

Cumulonimbus 15,000

Cumulus 8,000

Stratocumulus 9,000

Stratus 4,000

Addition of whole numbers is used by everyone. For example, to prepare an annual
budget, an accountant adds separate line item costs. To determine the number of
yearbooks to order, a principal adds the number of students in each grade level. A
flight attendant adds the number of people in the first-class and economy sections to
find the total number of passengers on an airplane.

SECTION 1.2

Adding Whole Numbers

1 Add whole numbers.

To add whole numbers, think of combining sets of similar objects. For example, if a set
of 4 stars is combined with a set of 5 stars, the result is a set of 9 stars.

A set of

5 stars

A set of

9 stars

We combine these two sets to get this set.

A set of

4 stars

Objectives

1 Add whole numbers.

2 Use properties of addition to add

whole numbers.

3 Estimate sums of whole

numbers.

4 Solve application problems by

adding whole numbers.

5 Find the perimeter of a rectangle

and a square.

6 Use a calculator to add whole

numbers (optional).