Page 33 - Basic College Mathematics with Early Integers

10 C HAPTE R 1 I THE WHOLE NUMBERS

PRACTICE 8–11 Examples Write each number in standard form.

Write each number in standard
8. sixty-one 61 9. eight hundred five 805
form.
8. twenty-nine 10. nine thousand, three hundred eighty-six
9. seven hundred ten
10. twenty-six thousand, 9,386 or 9386
seventy-one
11. two million, five hundred sixty-four thousand, three hundred fifty
11. six million, five hundred
seven
2,564,350

Work Practice 8–11

A comma may or may not be inserted in a four-digit number. For example, both
9,386 and 9386
are acceptable ways of writing nine thousand, three hundred eighty-six.

Objective Writing a Whole Number in Expanded Form

The place value of a digit can be used to write a number in expanded form. The
expanded form of a number shows each digit of the number with its place value. For
example, 5672 is written in expanded form as

5 thousands 6 hundreds 7 tens 2 ones
c c c c c c c c
digit place + digit place + digit place + digit place
value value value value

∂ ∂ ∂ ∂
5672 = 5000 + 600 + 70 + 2

PRACTICE 12 Example 12 Write 2,706,449 in expanded form.

Write 1,047,608 in expanded
form. Solution: 2,000,000 + 700,000 + 6000 + 400 + 40 + 9

Work Practice 12

We can visualize whole numbers by points on a line. The line below is called a
number line. This number line has equally spaced marks for each whole number.
The arrow to the right simply means that the whole numbers continue indefinitely.
In other words, there is no largest whole number.
Copyright 2012 Pearson Education, Inc.
Number Line

0 1 2 3 4 5 6 7

Answers We will study number lines further in Section 1.5.
8. 29 9. 710
10. 26,071 11. 6,000,507
12. 1,000,000 + 40,000 + 7000 + 600 + 8