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Q&A #495

Teachers' Lounge Discussion: Rounding numbers to the nearest ten

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From: Chad <chad_burton@sci.edu>
To: Teacher2Teacher Public Discussion
Date: 2008100614:21:31
Subject: Re: rounding numbers

Gladys: 

This is a common question among students young and old. Think of
rounding like going up a mountain. Starting at 0 you work your way up
the mountain...1,2,3,4 and you hit 5. 5 is the mountain peak and then
to go down the mountain you pass 6, 7, 8, and 9. 

So....to answer your question you need only look at the number in the
"ones" position. Which in your case is 8. Because that number is going
down the mountain slope, you slide to the next highest number which
would be 300. 

The basic concept is if the number in the ones position is 5,6,7,8, or
9 you would round up. example 273 rounds to 270, 146 rounds up to 150
and so on. 

I hope this helps !


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