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Topic:
Third grade homework problem....
This thread has 26 replies. Displaying posts 1 through 15.
Post 1 made on Monday February 17, 2014 at 20:09
Fins
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Round the following numbers to the nearest hundred:

14
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Post 2 made on Monday February 17, 2014 at 20:14
Tom Ciaramitaro
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Didn't you skip that grade?
There is no truth anymore. Only assertions. The internet world has no interest in truth, only vindication for preconceived assumptions.
OP | Post 3 made on Monday February 17, 2014 at 20:24
Fins
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No, but thanks to my 9y/o, I am taking it again. And lately I've caught some questionable problems on the math homework.
Civil War reenactment is LARPing for people with no imagination.

Post 4 made on Monday February 17, 2014 at 20:38
highfigh
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On February 17, 2014 at 20:09, Fins said...
Round the following numbers to the nearest hundred:

14

'14' is one number, made from two numerals.

Is that all of the numbers?
My mechanic told me, "I couldn't repair your brakes, so I made your horn louder."
OP | Post 5 made on Monday February 17, 2014 at 20:52
Fins
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On February 17, 2014 at 20:38, highfigh said...
'14' is one number, made from two numerals.

Is that all of the numbers?

There were two numbers to the problem. The first was 346. She rounded that to 300. Then the other one is 14. So how would you round it to the nearest 100?
Civil War reenactment is LARPing for people with no imagination.

Post 6 made on Monday February 17, 2014 at 21:06
SOUND.SD
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Treat it like any other number. I understand its confusing but that's the intent. When rounding to nearest hundred If the last two digits are 49 or less replace it with 00. If 50 or above replace with 00 and add 100.

Otherwise the math purpose for rounding (simplicity and averages) wouldn't work.

They want her to think about why, which makes it confusing for us that are use to this being a simple problem.
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Post 7 made on Monday February 17, 2014 at 21:47
highfigh
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On February 17, 2014 at 20:52, Fins said...
There were two numbers to the problem. The first was 346. She rounded that to 300. Then the other one is 14. So how would you round it to the nearest 100?

Round it down. It can't be considered closer to 100 than , which is the next point that would qualify. You round up as soon as halfway has been exceeded. This is not only about learning about rounding, it's also about significant digits.
My mechanic told me, "I couldn't repair your brakes, so I made your horn louder."
OP | Post 8 made on Monday February 17, 2014 at 23:33
Fins
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I know how to round off. But what I'm undecided on is if they would expect a 3rd grader to think advanced enough to consider 0 a hundreds place.
Civil War reenactment is LARPing for people with no imagination.

Post 9 made on Tuesday February 18, 2014 at 00:40
Ernie Gilman
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On February 17, 2014 at 20:52, Fins said...
There were two numbers to the problem. The first was 346. She rounded that to 300. Then the other one is 14. So how would you round it to the nearest 100?

So, come on, help us out here. When the problem says there are more than one number, don't give us just one number and mislead us into trying to figure out how one number can be more than one.

Re the problem:
114 rounds to 100.
214 rounds to 200
014 rounds to 000.
The leading zeroes concept might be WAY too much detail for a nine-year old to realize. It might, however, be part of the lesson or a previous lesson. You need to ask about that.

Did your kid ever learn that 1 = 01 = 001? And actually absorb it? Like I say, it's a tough concept.


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Post 10 made on Tuesday February 18, 2014 at 01:48
Mario
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Is this the round two sets of numbers to around 300 problem?

 
Post 11 made on Tuesday February 18, 2014 at 01:48
MikeZTC
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On February 17, 2014 at 23:33, Fins said...
I know how to round off. But what I'm undecided on is if they would expect a 3rd grader to think advanced enough to consider 0 a hundreds place.

Well, I mean, there are 10 countries who perform better than the US, on average, at fourth grade level mathematics...

Singapore
Korea
Hong Kong
Chinese Taipei
Japan
Northern Ireland
Belgium (Flemish)
Finland
England
Russian Federation
United States

[Link: timss.bc.edu]

[Link: en.wikipedia.org]

Fourth grade in Singapore introduces Algebra and Geometry...

[Link: sde.com]
MikeZTC, CTS-D, CTS-I, DMC-E
Post 12 made on Tuesday February 18, 2014 at 01:51
Mario
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I just did that with my 8 year old this morning.

Draw a line from 0 to 500 and divide each 100 into 2 or more sections.
Ask her to approximate where her number is and tell her to round up (or down) to the nearest 100. Then ask her to add the two numbers.
It's not a calculating problem, only estimating.

BTW, the answer is A and C.
B only gets you to 200

Last edited by Mario on February 18, 2014 02:16.
Post 13 made on Tuesday February 18, 2014 at 02:12
Ernie Gilman
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Marion,
I'm assuming you mean round up (or down) to the nearest 100, not just to 100.

What you've written sounds so far removed from what I've read so far that I really want to see the entire and exact text.  Please.
A good answer is easier with a clear question giving the make and model of everything.
"The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw
Post 14 made on Tuesday February 18, 2014 at 02:15
Mario
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On February 18, 2014 at 02:12, Ernie Gilman said...
Marion,
I'm assuming you mean round up (or down) to the nearest 100, not just to 100.

What you've written sounds so far removed from what I've read so far that I really want to see the entire and exact text.  Please.

Yeap, fixed it; thanks.
Post 15 made on Tuesday February 18, 2014 at 04:14
Ernie Gilman
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So what was the actual complete text of the problem?
A good answer is easier with a clear question giving the make and model of everything.
"The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw
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