The old stuff (1 Viewer)

[urf]

I do know that this is not nessary for the HSC but...
I just realised the other day that I have absolutely no idea how to do long-division and long-multiplication, I was expecting to be able to do it really easy, being a primary school subject and all but these two areas are bloody difficult. I do remember being able to do these when I was about 12 years old but I have zero idea on how to do this. And now it's really bugging me.

My question is:
Does anyone actually remember this stuff??

 

[FinalFantasy]

i used to not know long division until we did polynomials in 4unit and i learnt it back
but "long multiplication"... wat u mean lol?
multiplication u just "do it"

 

[Jago]

calculator?

 

[urf]

Long multiplication is multiplication done on paper where both numbers being multiplied have two or more digits (i.e. ten or above).

 

[urf]

calculator?

This is all on paper we're talking about. You cant tell me you dont remember learning it in year 6.

 

[Dreamerish*~]

Long multiplication is multiplication done on paper where both numbers being multiplied have two or more digits (i.e. ten or above).

You might need to know how to do long division for polynomials, I think.

Eg. When you need to find whether (x - 1) is a factor of x³ + 5x² + 2x + 17, etc. But then again, you can just sub x = 1 into the equation...

For everything else, you can use a calculator. I don't think it's that important. However, it isn't hard to learn, so learn it anyway.

 

[velox]

Yay the factor theorm.

 

[Jago]

This is all on paper we're talking about. You cant tell me you dont remember learning it in year 6.

I barely remember year 11.

 

[FinalFantasy]

yea i know wat u mean now
but u can just do it the "algebraic way" lol
just do it normally for multiplication
long division would be useful though

 

[acmilan]

You probably wont need either for 2 unit mathematics, but long division comes useful in 3 unit polynomials, although often there would be a method to avoid using it, sometimes its unavoidable. As for long multiplication, due to the presence of a calculator and no non-calculator sections in the exam, there would be no place where you would have to do the multiplications on paper. That being said, knowing both methods wont hurt you in any way.

 

[urf]

I know it wont come up in the HSC, I just wanted to know if anyone actually does remember it

 

[acmilan]

Oh in that case, I remember 'long multiplication', im kind of weird with long division. I have no problems doing long division algebraically but I have problems doing it with numbers, mainly because I never did maths at all in primary school and hence never learnt it.

 

[FinalFantasy]

Oh in that case, I remember 'long multiplication', im kind of weird with long division. I have no problems doing long division algebraically but I have problems doing it with numbers, mainly because I never did maths at all in primary school and hence never learnt it.

aye, same w\ me!

 

[who_loves_maths]

Originally Posted by urf
...I do remember being able to do these when I was about 12 years old but I have zero idea on how to do this....

hahaha... nice subliminal pun there! since you can't divide by zero?!

 

[urf]

Funny in a really really really sad way

 

[who_loves_maths]

just cause it was a maths joke ...

 

[Slidey]

I know long division, long multiplication and involution. I often use them, too. they're not useless.

 

[Trev]

I know long division, long multiplication and involution. I often use them, too. they're not useless.

What's involution?

 

[urf]

I know long division, long multiplication and involution. I often use them, too. they're not useless.

What do you use them for??

 

[switchblade87]

What the...

It's not too hard to do long multiplication and long division...

I know long division, long multiplication and involution. I often use them, too. they're not useless.

I'm a bit disturbed at Slide Rule however, I looked up involution, and among other things, a prominent definition is:

Contractions of the uterus following childbirth that return it to its prebirth size and shape.

You use them often, eh?
I'm thinking he really means:

In mathematics, an involution is a function that is its own inverse, so that
f(f(x)) = x for all x in the domain of f. Courtesy of Wikipedia.