Chapter 3 Operations With Decimals Worksheet Page 10
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133-3
Rounding Decimals
MAIN IDEA
MOVIES
The prices of movie tickets
Round decimals.
from five different theaters are shown
in the table.
Theater
Price ($)
NYS Core Curriculum
Movie Max
$8.75
Round each price to the nearest dollar.
1.
6.N.27 Justify the
Star Theater
$7.95
reasonableness of
How did you decide how to round
2.
answers using
Movie Mania
$6.25
each number?
estimation (including
Dollar Theater
$1.75
rounding). 6.CN.3
Make a conjecture about how to
3.
Connect and apply
Cine-mart
$9.60
round each price to the nearest dime.
mathematical
information to solve
problems. Also
addresses 6.N.14.
You can round decimals just as you round whole numbers.
NY Math Online
Round Decimals
Key Concept
To round a decimal, first underline the digit to be rounded.
• Extra Examples
• Personal Tutor
Then look at the digit to the right of the place being rounded.
• Self-Check Quiz
• If the digit is 4 or less, the underlined digit remains the same.
• If the digit is 5 or greater, add 1 to the underlined digit.
• After rounding, drop all digits after the underlined digit.
Round Decimals
1
Round 1.324 to the nearest whole number.
Underline the digit
1.324
to be rounded.
Since 3 is less than 5, the
digit 1 remains the same.
On the number line, 1.3 is closer to
1.3
1.0 than to 2.0. To the nearest whole
1.0
2.0
number, 1.324 rounds to 1.
2
Round 99.96 to the nearest tenth.
Underline the digit
to be rounded.
99.96
Since the digit is 6, add one
to the underlined digit.
On the number line, 99.96 is closer to
99.96
100.0 than to 99.9. To the nearest tenth,
99.9
100.0
99.96 rounds to 100.0.
146
Chapter 3 Operations with Decimals
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