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Q&A #7392

Teachers' Lounge Discussion: How do I teach rounding to fourth graders who just don't seem to get it?

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From: Betty Pennington <penningtonfarms@alltel.net>
To: Teacher2Teacher Public Discussion
Date: 2007091721:56:57
Subject: rounding to the greatest place

 My grandson (of whom I have custody) is in the fourth grade. His
homework last night called for rounding to the greatest place.
Here is the problem:
17
73
289
27

The answer (which we got wrong) was 420

17 to 20
73 to 80
289 to 290
27 to 30

Is that you way you would come up with it, or would be it
to round the 289 to 300. I really can't see rounding 73 to 80 or
rounding 289 to 300. I thought the answer would be 410. 

It has been a while since I was in school, but I have a BSE and hold a
current teaching certification althought not it math, but I was always
pretty good at math. I sure don't understand this new stuff where you
don't round to tenths or hundredths etc, but greatest place?  This is
very confusing for me, much less a fourth grader.

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