Please Help EMERGENCY 5th grade Math question!!!

[DisOrBust]

We are in Math hell right now trying to help our DD study for her test. Here is the question that has us stumped.

Using Magnitude Estimation determine the place value of the answer.

11.2 X 0.2

According to maginitude estimation it would be
11X 0 =0????? Can Zero be in the "ones place"?????

I know the answer is 2.24 Its the maginatude Estamation that has us challenged??


TIA!!
Sue

 

[lewdyan1]

We are also in fifth grade...and I am sorry to say, I haven't a clue!

Good Luck!

 

[DisOrBust]

Glad to know someone feels my pain....

 

[monarchsfan16]

I'm a little confused by your question. Are you asking how they got zero, or if zero can be in the ones place?
They got zero, because in estimating they'd round 0.2 to zero. I think that zero has to be in the "ones" place, because the other places are decimals, or tens, hundreds, etc.

 

[Twinkles6892]

I really enjoy math, but I was never taught this! I hate all this estimation junk, just teach the kids the proper way and get it over with.

I'm sorry you're having trouble

 

[Kermit]

Does her book define magnitude estimation? That's a term I'm unfamiliar with.

 

[bhoffman]

So far all I can find on the net tells me that the Math teacher is pulling your leg or did not give full instructions. The bulk of net activity talks about using Magnitude Estimation for calculating sensory stimulus (giving a number to a feeling). Sorry, tried to help but my next idea is to email the teacher.
I simple answer to your question is yes IF the teacher is looking to estimate the input and answer by only looking to the ones spot, the answer would be zero.

 

[DisOrBust]

I'll try to explain...(something about the blind leading the blind is echoing in my head .... )

Magnitude estimation is use to determine if your answer will be in the ones, tens etc place. Basically you round to the nears one ten hundred etc...

Example 12 X 2 20

ME 10X 200= 2000

So your answer woud be in the "thousands" place.

The proble with 11 X .2 is
The ME 10 X 0 with the answer being zero so I gues what I'm asking is 0(zero) in the "ones" place???

TIA

 

[Cindy B]

I would think magnitude estimation is basically a fancier term for estimating.

Therefore 11.2 is 11?

 

[momof2inPA]

I really enjoy math, but I was never taught this! I hate all this estimation junk, just teach the kids the proper way and get it over with.

No kidding. What a waste of time.

 

[bhoffman]

I'll try to explain...(something about the blind leading the blind is echoing in my head .... )

Magnitude estimation is use to determine if your answer will be in the ones, tens etc place. Basically you round to the nears one ten hundred etc...

Example 12 X 2 20

ME 10X 200= 2000

So your answer woud be in the "thousands" place.

The proble with 11 X .2 is
The ME 10 X 0 with the answer being zero so I gues what I'm asking is 0(zero) in the "ones" place???

TIA

Following your example I would say yes 0 is in the ones place.

 

[paigevz]

Yes, the zero is in the ones place in that scenario.

When you do the actual problem, you get 2.24 or some such..............which, if rounded to the nearest 10, would be zero.

So, I'd say her answer is a zero in the ones place............I don't know if she couches her answer as a number, e.g. 0, or as a place, e.g. ones.

 

[buzzlady]

I hate all this estimation junk, just teach the kids the proper way and get it over with.

I couldn't agree more! Another pet peeve is the word guestimate.

 

[Brianne]

Fifth grade here too, but problems like that are why I direct all math questions to DH.

I don't remember doing algebra, etc in fifth grade (in the 80s)? I'm not that old, really!

I'd have her ask her teacher to clarify things a bit more.

 

[Lisa loves Pooh]

I couldn't agree more! Another pet peeve is the word guestimate.

I so stink at what I call "quantitative guestimation".


I can understand the concept---to know if you are looking for an x-digit number. But this is so silly!

Zero can be a place holder in any spot--hundreds, thousands, tens, ones, et cetera!

So in the "guessing" part when you get 0--0 is in the ones place.

The real answer is 2.24--and you have gotten your "guess" answer correct!

I'm just doing Kindergarten math right now---my daughter is being drilled with every value has a place---even if that value is ZERO.

 

[phamton]

Learning to estimate is just as important as learning the exact answer. We use it all the time. In elem. school they learn estimation to determine if they got the correct answer before they do the math.

For instance if you know 99 X 2 is about 200, it helps you check your answer. So if you multiply and get 1098 instead of 198, you can look at you estimation and see you made a mistake.

As far as the magnitude estimation, I would guess, they are having you look at the decimal point on 0.2. You know that your answer will be double but you will also have to move over a decimal point in the final answer. So the place value will move over one.

11.2 x 0.2

estimate 11 x 2= 22

But because of the decimal in .2, your answer would be 2.2 not 22.

edited to add: it seems that most who have posted to this thread believe that estimating is the same as rounding. You often estimate without rounding to the nearest number. There is no need to round to zero in your problem as you can estimate by doubling the number and then placing the decimal point where it needs to be. Rounding to the nearest place is not the same as estimating.

 

[DWDreams]

My daughter is in 5th grade also, I think the word you're using is just a fancy term for estimating to Place Value. My daughter was just working on problems similar to this and they called it Place Value to Thousandths or something like that.

The way I understood her homework, which admittedly may not have been entirely correct given my math skills, you're answer with -0- is correct. But you better check that coming from me!

 

[DisOrBust]

Thanks all! It doesn't really jive well for me that ending with an answer of Zero would make my think my answer of 2.2 was correct???

Oh Well!

Thanks again!
sue

 

[Serena]

Could you all try to repeat all that in english?