Where zeros matters

[Andres Santana]

I got a little bit confuse on doing this decimal division by hand.

124.12 / 4 

why? because the fact that after the point zero matters.

Let's see a pseudo example:

2002 / 91

We'll take 91 and say it goes into 2 how many times? The answer is ZERO, but since we're

in integer a zero to the left does not matter so we don't write it. But after the point a zero to the left

DOES MATTER and needs to be written down.

Try 124.12 / 4 (by hand and you'll see what I mean)

I mean this is basic arithmetic but the use of a calculator made me forget how to do it by hand.

Enjoy.

--
arsh

[Carlitos]

Side note:

124.12 / 4 is easy because a can be decomposed into parts that are
*multiple of 4:

(120 + 4 + 0.12)/4 = 120/4 + 4/4 + 0.12/4 = 30+1+0.3 = 31.03

On Oct 20, 3:32 pm, Andres Santana <andres.sant...@gmail.com> wrote:
> I got a little bit confuse on doing this decimal division by hand.
>

> *124.12 / 4 *

>
> why? because the fact that after the point zero matters.
>
> Let's see a pseudo example:
>
> 2002 / 91
>
> We'll take 91 and say it goes into 2 how many times? The answer is ZERO, but
> since we're
> in integer a zero to the left does not matter so we don't write it. But
> after the point a zero to the left
> DOES MATTER and needs to be written down.
>

> Try *124.12 / 4 *(by hand and you'll see what I mean)

[Carlitos]

Typo: *0.3 = 0.03

[Andres Santana]

Yeah I got it, it just confused me on the beginning. 

Keep on it.

--
arsh

[Rodolfo Hansen]

A technique taught in 4th grade math is simply multiplying by the appropriate proper power of ten, and then dividing again.....

as in:
1234.12 / x   =   123412 / x / 100

that way, you keep tings simple...