How to Round and Estimate

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 I can round whole numbers to the nearest
tens, hundreds, and thousands place
 I can make ballpark estimates
 I can select and use applications effectively
and productively
Find the digit.
Look next door.
Five or higher,
Add one more.
Four or less,
Let it rest.
To round to the nearest tens place, find the
digit in the tens place:
24
Tens place
“Look next door”
24
“Four or less, let it rest.”
That means the “4” is telling the “2” to rest, and
the “4” becomes a “0.”
24 rounded to the nearest ten is 20
Round this number to the nearest ten:
348
“Find the digit.
Look next door.”
348
Round this number to the nearest ten:
348
“Five or more, add one more.”
The “8” is more than five
Add one more to the “4”
348
350
The “4” becomes a “5”
The “8” becomes a “0”
 http://www.funbrain.com/tens/index
.html
Choose from the game box on the right,
called “Round Number,” and decide
which level you would like to begin.
See if you can reach the highest level,
“Super Brain.”
“Find the digit”
572
Hundreds place
“Look next door.”
572
572
“Five or more, add one more.”
“7” is more than five
Add one to “5” to make it “6”
Change “7” and “2” to “00”
572
600
http://www.mrnussbaum.com/roundin
g.htm
• Choose a drill on rounding to the
nearest hundred, or
• Choose a game to play on rounding.
You may need to watch a tutorial first.
“Find the digit.”
3078
“Look next door.”
3078
“Look next door.”
3078
“Four or less, let it rest”
The “0” is less than four, so the “3” will rest.
The “078” becomes “000”
3078 3000
http://www.mrnussbaum.com/roundin
g.htm
• Choose a drill on rounding to the
nearest thousand, or
• Choose a game to play on rounding.
You may need to watch a tutorial first.
 Watch the instructions on how to play
http://www.mrnussbaum.com/maximumc
apacity.htm
 You may play the game afterwards
 Estimation is like rounding to the highest
place value digit.
4367
4000
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