Basic Mathematics for College Students

4 Chapter 1 Whole Numbers

 

c.Thousands Ones Say the names of the periods, working from right to left.

89 , 015

Eighty-nine thousand,fifteen We do not use a hyphen to write numbers between 1

and 20, such as 15. The ones period is not written.

d.MillionsThousandsOnes Say the names of the periods, working from right to left.

6 , 0 7 0 , 5 3 4

Six million, seventy thousand,five hundredthirty-four.

The ones period

is not written.

  

Self Check 3

Write each number in standard
form:
a.Two hundred three thousand,
fifty-two
b.Nine hundred forty-six
million, four hundred
sixteen thousand,
twenty-two
c.Three million, five hundred
seventy-nine

Now TryProblems 39 and 45

EXAMPLE (^3) Write each number in standard form:
a.Twelve thousand, four hundred seventy-two
b.Seven hundred one million, thirty-six thousand, six
c.Forty-three million, sixty-eight
Strategy We will locate the commas in the written-word form of each number.
WHY When a whole number is written in words, commas are used to separate
periods.
Solution
a.Twelve thousand , four hundred seventy-two

12, 472

b.Seven hundred one million , thirty-six thousand , six

701,036,006

c.Forty-three million , sixty-eight The written-word form does not mention the

thousands period.

43,000,068 If a period is not named, three zeros hold its place.

 

  

 

Success Tip Four-digit whole numbers are sometimes written without a

comma. For example, we may write 3,911 or 3911 to represent three thousand,

nine hundred eleven.

3 Write a whole number in expanded form.

In the number 6,352, the digit 6 is in the thousands column, 3 is in the hundreds column,

5 is in the tens column, and 2 is in the ones (or units) column. The meaning of

6,352 becomes clear when we write it in expanded form (also calledexpanded notation).

6,3526 thousands3 hundreds5 tens2 ones

or

6,352 6,000  300  50  2

Caution! Two numbers, 40 and 90, are often misspelled: write forty(not

fourty) and ninety(not ninty).