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Place Value: Rounding and Estimation

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by

Nichole Deno

on 17 September 2012

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Transcript of Place Value: Rounding and Estimation

Estimation to the Nearest Whole Number Rounding to the nearest place value. How to Estimate Using Whole Numbers What is
rounding? Rounding is
a way to estimate Just like addition and subtraction.
There are key words that tell you to round. about, approximately,
and around are words that
tell you to estimate. Rounding Rap
Find your place value and circle that digit.
Move to the right and underline, get it?
O-4 Circle stays the same.
5-9 Add one is the game.
Now flex your muscles like a hero
All digits to the right change to zero
All other digits remain the same.
Yo! You're a winner in the rounding game! Use to rap to help you solve the following problems! Let's practice! Start with the number:
3,567,128 We will round
to the nearest million's place.

"Find that number and Circle
that digit!" The 3 is in the millions place.
Circle it!
Now, "Move to the right and underline, get it? Underline that 5! 0-4 circle stays the same.
5-9 add one is the game! The number 5 is underlined,
so we have to add 1 to the number in the circle.
This makes the number in the circle a 4.
Write that underneath. Now flex your muscles like a hero.
Digits to the right change to zero! All other digits are
now zero. Your new number
is 4,000,000. This time, use the number
3, 567,128 and round to the
nearest hundred-thousand. Find your place value
and circle that digit. That's right, circle the 5! Now move to the right
and underline, get it? underline the 6. 0-4 circle stays the same
5-9 add one, that's the game! Add one to the circled 5
and write your new number (6)
underneath the circle. Now flex your muscles like a hero.
Digits to the right change to zero! All other digits remain the same.
Yo! You're a winner in the rounding game! Your new number should be
3,600,000 Time for you to try! Round the following numbers to the nearest hundred thousand. Problem 1:
233,467,908

Problem 2:
908,671,391

Problem 3:
406,198

Problem 4:
271,980

Problem 5:
617,249
Round the
following numbers
to the nearest million:

Problem 6:
34,425,681

Problem 7:
12,980,091

Problem 8:
7,098,345
Answers:

1.) 233,500,000
2.) 908,700,000
3.) 400,000
4.) 300,000
5.) 600,000
6.) 34,000,000
7.) 13,000,000
8.) 7,000,000
Full transcript