Recreational Mathematics

[Griff]

Originally Posted by tw

Barbie said math is hard. Some people even believe philosophies taught by a doll.

Actually it would be math teachers without "soft" or basic human skills, who make math hard. I learned it whenever I needed it, but was programmed by math teachers very early on to never enjoy it.

[Lamplighter]

Odd how different experiences can be...

My Junior year high school math teacher turned me on to mathematics.
He also taught Biology and Chemistry, but I don't remember which years those were,
but I remember them classes as "good" classes.

In today's vernacular I guess he would just be called a "good teacher".

[SamIam]

Originally Posted by infinite monkey

YOU try cooking for the entire village hunting party's return. How am I supposed to know how much lard to use when I usually only cook for my brood of 12?

That's just arithmetic. Divide the number of people in the hunting party by 12 and multiply the result by the amount of lard you normally use and voila!

REAL math always has something spatial hidden away in it, like trying to figure out the area under a curve or those bizzare calculus problems where you are supposed to buy into the concept of X approaching infinity. How the hell do you "approach" infinity, anyhow? And why would you want to?

Or the stupid geometric proofs that almost caused me to drop out of the 10th grade. If I hadn't gotten my Dad to do most of my geometry homework for me, I'd be just another high school dropout standing on a street corner with a sign reading, "Will work for mind altering drugs." Oh wait! I already do that. Never mind.

My point is that it's a well known fact that women have no spatial abilities. Therefore we should stay away from stuff like math and geometry and calculus, and you certainly shouldn't leave camp with any hunting parties. Why, who knows where you might end up wandering off to? Just tend to that cooking fire, woman.

[Lamplighter]

How the hell do you "approach" infinity, anyhow? And why would you want to?

Sam, I thought you already answered those questions (elsewhere)

[SamIam]

Originally Posted by Lamplighter

Sam, I thought you already answered those questions (elsewhere)

Yeah, I'm just full of profound statements. Ask anyone.

[glatt]

My middle school daughter just turned me on to this nerdtastic math channel on youtube. A day late, but here's some mathed potatoes.

[Lamplighter]

One potato, two potato, three potato, four,
five potato, six potato, seven potato more.
Icha bacha, soda cracker,
Icha bacha boo.
Icha bacha, soda cracker, out goes Y-O-U!


You're it !

[ZenGum]

Like, whoaaah, man.

[ZenGum]

Oh and

1 x 1 = 1
11 x 11 = 121
111 x 111 = 12321
1111 x 1111 = 1234321
11111 x 11111 = 123454321
111111 x 111111 = 12345654321
1111111 x 1111111 = 1234567654321
11111111 x 11111111 = 123456787654321
111111111 x 111111111 = 12345678987654321

Cosmic, man.

[xoxoxoBruce]

Hmm

[xoxoxoBruce]

and

[ZenGum]

Japanese multiplication method

The lines and numbers above may not make any sense at first, but according to William C. at Themetapicture.com: "The lines over the circles are color coded. notice the single red line and 3 blue lines representing "13" group together while the single green and 2 black lines take their own group. [Simply] draw your first group of lines in one direction then your second group of lines going over the first, count the groups of intersections and there's your answer."

ETA:

[BigV]

Please demonstrate 1 * 10

Or other factors with a digit zero

Eta. Also, whoa!

[ZenGum]

Honorabu Big-B-san

Easy to draw inbisibru rine to represent zero. Just not to forget where draw it. Has no intersections.

Prease to remember, "zero" is name of fighter prane make during war, arso call "frying coffin". Traumatic memories, prease not to mention to chirdren.

Zensei.

[Lamplighter]

[quote=ZenGum;847990]Japanese multiplication method


Attachment 42457

This is an interesting illustration.
But I doubt adults use the the method.
It's sort of like kids adding by counting on their fingers.
It's also what we do in algebric multiplication of polynomials...




but then if, as Big V asks, what happens with zero's, we leave gaps in the summation: