Page 363 - Basic College Mathematics with Early Integers

Chapter 4 Vocabulary Check

Fill in each blank with one of the words listed below.
vertically decimal and right triangle hypotenuse legs
sum denominator numerator square root standard form

1. Like fractional notation, notation is used to denote a part of a whole.
2. To write fractions as decimals, divide the by the .
3. To add or subtract decimals, write the decimals so that the decimal points line up .
4. When writing decimals in words, write “ ” for the decimal point.
5. When multiplying decimals, the decimal point in the product is placed so that the number of decimal places in the
product is equal to the of the number of decimal places in the factors.

6. The , 2 , of a positive number a is the positive number b whose square is a.
7. A is a triangle with a right angle.The side opposite the right angle is called the , and
the other two sides are called .
8. When 2 million is written as 2,000,000, we say it is written in .

Are you preparing for your test?
Don’t forget to take the Chapter 4Test on page 348.
Then check your answers at the back of the text
and use the Chapter Test Prep Videos to see the
fully worked-out solutions to any of the exercises
you want to review.
4 Chapter Highlights

Definitions and Concepts Examples

Section 4.1 Introduction to Decimals

PLACE-VALUE CHART
4 2 6 5
#
hundreds tens ones tenths hundredths thousandths ten-thousandths hundred-thousandths
c
decimal 1 1 1 1 1
100 10 1
point 10 100 1000 10,000 100,000
4.265 means
1 1 1
#
4 1 + 2 # + 6 # + 5 #
10 100 1000
or
2 6 5
4 + + +
10 100 1000
WRITING (OR READING) A DECIMAL IN WORDS Write 3.08 in words.
Step 1: Write the whole number part in words. Three and eight hundredths
Step 2: Write “and” for the decimal point.
Step 3: Write the decimal part in words as though it were
a whole number, followed by the place value of
the last digit.
A decimal written in words can be written in standard Write “negative four and twenty-one thousandths” in Copyright 2012 Pearson Education, Inc.
form by reversing the above procedure. standard form.
-4.021

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