View Full Version : < or > , you tell me

jennifer75

09-23-2008, 05:53 AM

so my 6 year old is leaning greater than, less than, and I did not do well in math....

so, tell me:

Does the aligator EAT the larger number, or POINT to it?

I know...bad. But hey.

sunna

09-23-2008, 05:56 AM

Alligator eats the bigger number.

Um. I think.

Did I do that in 1st grade? Good lord.

Williebee

09-23-2008, 05:58 AM

alligator eats the bigger number.

and substitute teachers.

But that may have just been my school.

Woodsie

09-23-2008, 06:01 AM

small end = small number

That's how I remembered it.

benbradley

09-23-2008, 06:12 AM

small end = small number

That's how I remembered it.

That's a great mnemonic . I always remembered it as it "points to" the smaller number.

jennifer75

09-23-2008, 06:17 AM

Fabulous. Thanks!

Yea, 1st grade. I remember adding and subtracting, single digit numbers, but greater than less than? Heck.

sunna

09-23-2008, 06:25 AM

Crap, all I remember is bringing in the Red Riding Hood version where the wolf eats grandma and horrifying my teacher. And kissing J.M. on the lips, for which I nearly lost an ear.

Was there math that year? Damn.

Well, lets hear it for progress.

Bayou Bill

09-23-2008, 06:41 AM

so my 6 year old is leaning greater than, less than, and I did not do well in math....

so, tell me:

Does the aligator EAT the larger number, or POINT to it?

I know...bad. But hey.

Jennifer, bless your heart, you have inspired me to post the lyrics to Tom Lehrer's, NEW MATH.

Bayou Bill :cool:

Some of you who have small children may have perhaps been put in the

embarrassing position of being unable to do your child's arithmetic homework

because of the current revolution in mathematics teaching known as the New

Math. So as a public service here tonight I thought I would offer a brief

lesson in the New Math. Tonight we're going to cover subtraction. This is the

first room I've worked for a while that didn't have a blackboard so we will

have to make due with more primitive visual aids, as they say in the "ed biz."

Consider the following subtraction problem, which I will put up here: 342 -

173.

Now remember how we used to do that. three from two is nine; carry the one, and

if you're under 35 or went to a private school you say seven from three is six,

but if you're over 35 and went to a public school you say eight from four is

six; carry the one so we have 169, but in the new approach, as you know, the

important thing is to understand what you're doing rather than to get the right

answer. Here's how they do it now.

You can't take three from two,

Two is less than three,

So you look at the four in the tens place.

Now that's really four tens,

So you make it three tens,

Regroup, and you change a ten to ten ones,

And you add them to the two and get twelve,

And you take away three, that's nine.

Is that clear?

Now instead of four in the tens place

You've got three,

'Cause you added one,

That is to say, ten, to the two,

But you can't take seven from three,

So you look in the hundreds place.

From the three you then use one

To make ten ones...

(And you know why four plus minus one

Plus ten is fourteen minus one?

'Cause addition is commutative, right.)

And so you have thirteen tens,

And you take away seven,

And that leaves five...

Well, six actually.

But the idea is the important thing.

Now go back to the hundreds place,

And you're left with two.

And you take away one from two,

And that leaves...?

Everybody get one?

Not bad for the first day!

Hooray for new math,

New-hoo-hoo-math,

It won't do you a bit of good to review math.

It's so simple,

So very simple,

That only a child can do it!

Now that actually is not the answer that I had in mind, because the book that I

got this problem out of wants you to do it in base eight. But don't panic. Base

eight is just like base ten really - if you're missing two fingers. Shall we

have a go at it? Hang on.

You can't take three from two,

Two is less than three,

So you look at the four in the eights place.

Now that's really four eights,

So you make it three eights,

Regroup, and you change an eight to eight ones,

And you add them to the two,

and you get one-two base eight,

Which is ten base ten,

And you take away three, that's seven. Ok?

Now instead of four in the eights place

You've got three,

'Cause you added one,

That is to say, eight, to the two,

But you can't take seven from three,

So you look at the sixty-fours.

"Sixty-four? How did sixty-four get into it?" I hear you cry.

Well, sixty-four is eight squared, don't you see?

(Well, you ask a silly question, and you get a silly answer.)

From the three you then use one

To make eight ones,

And you add those ones to the three,

And you get one-three base eight,

Or, in other words,

In base ten you have eleven,

And you take away seven,

And seven from eleven is four.

Now go back to the sixty-fours,

And you're left with two,

And you take away one from two,

And that leaves...?

Now, let's not always see the same hands.

One, that's right!

Whoever got one can stay after the show and clean the erasers.

Hooray for new math,

New-hoo-hoo-math,

It won't do you a bit of good to review math.

It's so simple,

So very simple,

That only a child can do it!

Come back tomorrow night. We're gonna do fractions.

Now I've often thought I'd like to write a mathematics text book someday because I have

a title that I know will sell a million copies. I'm gonna call it Tropic Of

Calculus.

CACTUSWENDY

09-23-2008, 07:00 AM

New math? lmao.....Wow. You just lost me.

<<<<<hangs head and wonders off...............

maestrowork

09-23-2008, 06:07 PM

Eats.

1 <3 U

Shadow_Ferret

09-23-2008, 06:12 PM

Does the aligator EAT the larger number, or POINT to it?

I thought I knew until you said this. Alligator? Now I'm really confused.

vixey

09-23-2008, 06:25 PM

Crap, all I remember is bringing in the Red Riding Hood version where the wolf eats grandma and horrifying my teacher.

I brought in Little Black Sambo, my favorite book at the time, and my mother was horrified I would be shunned out of the school! (It was 1967 - nothing happened.)

And kissing J.M. on the lips

I got up in the middle of class, walked over to Marshall Somebody and kissed him in front of everyone!

* * * * *

OH - Back to the OP. I think you've got your answer.

Big ended side = Big number

Little ended side = Little number

Williebee

09-23-2008, 06:29 PM

Base eights

You can't take three from two,

Two is less than three,

So you look at the four in the eights place.

Now that's really four eights,

So you make it three eights,

Regroup, and you change an eight to eight ones,

And you add them to the two,

and you get one-two base eight,

Which is ten base ten,

And you take away three, that's seven. Ok?

I think this is how I learned binary. :)

Williebee

09-23-2008, 06:31 PM

huh.

I brought in a Dr. Seuss book, "The Seven Lady Godivas (http://en.wikipedia.org/wiki/The_Seven_Lady_Godivas)".

They wouldn't let me read it to the class.

vixey

09-23-2008, 06:36 PM

huh.

I brought in a Dr. Seuss book, "The Seven Lady Godivas (http://en.wikipedia.org/wiki/The_Seven_Lady_Godivas)".

They wouldn't let me read it to the class.

I clicked on your link and thought the cover was worth posting.

http://upload.wikimedia.org/wikipedia/en/thumb/3/34/TheSevenLadyGodivas.jpg/447px-TheSevenLadyGodivas.jpg (http://upload.wikimedia.org/wikipedia/en/3/34/TheSevenLadyGodivas.jpg)

maestrowork

09-23-2008, 06:37 PM

That book should be banned.

sunna

09-23-2008, 06:38 PM

I'm glad to know that bringing in the wrong book is a common experience. :) I was mortified. (and baffled, as I grew up on the Grimm's Brothers and never imagined there might be something wrong with the woodsman performing impromptu abdominal surgery on the wolf to remove grandma - although I do recall wondering why Mr. Big Bad didn't wake up.)

You can't take three from two,

Two is less than three,

So you look at the four in the eights place.

Now that's really four eights,

So you make it three eights,

Regroup, and you change an eight to eight ones,

And you add them to the two,

and you get one-two base eight,

Which is ten base ten,

And you take away three, that's seven. Ok?I think this is how I learned binary. :)

*blinks*

Merciful Zeus. I would never have made it to 2nd grade.

DeleyanLee

09-23-2008, 06:40 PM

Base eights

I think this is how I learned binary. :)

I can count to 31 on one hand in binary. It's kinda fun to watch people's eyes glaze over when I do it.

Pagey's_Girl

09-23-2008, 06:54 PM

1001001, SOS, 1001001, in distress....100100....

benbradley

09-23-2008, 08:10 PM

Jennifer, bless your heart, you have inspired me to post the lyrics to Tom Lehrer's, NEW MATH.

...

You can't take three from two,

...

Heck, I can take three from two, AND take the square root of the difference! I know this may be 'complex' for some of you...

regdog

09-23-2008, 08:27 PM

Alligator eats bigger numbers

http://i94.photobucket.com/albums/l117/regdog/6ac35d0b.jpg

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