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“4. Use place value understanding to round decimals to any place.”
There are lots of ways to break ties.
http://en.wikipedia.org/wiki/Rounding#Tie-breaking
I’m going to go ahead and ask a question, and give what I presume is the response.
Q: Is there any preference for a particular form of tie-breaking from the standards?
A: The standards don’t specify, so it would be up to the assessment writers. If they are doing a good job, they won’t ask a question that requires a student to decide whether 2.5 rounds to 2 or to 3 because the standards don’t take a stance.
Some commentary on this in the Progressions might be appreciated.
Thanks Jim, I like the way you answered your own question … soon you’ll be able to answer everybody else’s as well and I can take a break!
Your answer is basically right, although I can imagine raising the question of where to round 2.5 in a Grade 5 class room and discussing the possible answers and the need for a convention. But making it a focus of assessment does seem inappropriate to me.
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