© Pearson Education, Inc., publishing as Pearson Prentice Hall.
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Class
Date
Name
Understanding Decimals
Lesson 1-5
NAEP 2005 Strand: Number Properties and Operations
Lesson Objective
Topic: Number Sense
To read, write, and round decimals
Local Standards: ____________________________________
Examples.
1 Writing a Decimal in Words Write 1.0936 in words.
Begin by writing 1.0936 in a place value chart
.
1.0936 d Four decimal places indicate ten-thousandths.
and
ten-thousandths
2 Standard Form and Expanded Form There are four thousand five
hundred thirty-six ten-thousandths kilograms in one pound. Write this
number in standard form and in expanded form.
.
d Write the whole number part. Place the decimal point.
0.
d Ten-thousandths is
places to the right of the decimal point.
0.
d Place 4536.
Standard form:
Expanded form:
!
!
!
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Course 1 Lesson 1-5
Daily Notetaking Guide
Name
Class
Date
3 Rounding Decimals Round 20.32 to the nearest tenth.
20.32 d Look at the digit to the
of the
place.
c
2
5, so round
.
So 20.32 rounded to the nearest tenth is 20.3.
Quick Check.
All rights reserved.
1. Write each decimal in words.
a. 67.3
b. 6.734
c. 0.67
© Pearson Education, Inc., publishing as Pearson Prentice Hall.
2. The winning car in a race won by fifteen hundredths of a second. Write the
decimal in standard and expanded forms.
3. Round each decimal to the underlined place.
a. 2.3428
b. 0.17347
c. 9.053
Daily Notetaking Guide
Course 1 Lesson 1-5
11