[quote author=Fu-Kwun Hwang link=topic=1039.msg4005#msg4005 date=1238580222]
I understand what you want now. But, do you really want to do that?
It is O.K. for small number like 1234 in the above case.
What if the number is 1234567 do you really want to bring down all the number?
[/quote]

i agree with u that i also don't want to bring down all the rest of the numbers. The teacher teaching want to teach divide and conquer idea so in his explanation, his method is the reasoning below our logic way of solving division. I agreed to help him get it done, i explain to him your and me agreement but he believes there is value in creating such a remix of your applet.

[quote author=Fu-Kwun Hwang link=topic=1039.msg4005#msg4005 date=1238580222]
In my case:
I only bring down 23 so student can figure out the next number is 4*5=20 <23
But if you bring down 234, will it be easier for student to figure out the next number is 4 ?
if you bring down 234, then you will need another number to store 23.
Because the next step is 23-20, otherwise you will have to calculate 234-200.

Please check out the original design
[img]http://www.coolmath4kids.com/long-division/images/long-division-30.gif[/img]
It is shown as 46-45 in the above picture. it is not shown as 465-450.

And for you new way of thinking tv[0]=1000 instead of tv[0]=10;

For my case:
tv[0]=10;
tv[1]=23;
tv[2]=20;
tv[3]=34;
tv[4]=30;
tv[5]=4;

For your new way of thinking:
tv[0]=1000;
tv[1]=230;
tv[2]=200;
tv[3]=34;
tv[4]=30;
tv[5]=4;

Because you only want to show tv[0] as 10, tv[2] as 20 so you will need to define another array to store 10, 20 in order to display it. (It will be easier to display 1000 for tv[0], but is it easy for student to know the first one is 200*5 instead of 2*5?

If you really want to do it that way:
What you need to change is
tv[0]*100;
tv[1]*10;
tv[2]*10;
tv[3]*1;
tv[4]*1;
tv[5]*1;

// the result is 246, you can get [b]100[/b] from 246


There are many different way to write the same program.

[/quote]

I agree with u but he is the implementor of the applet in some classroom, i only remix from yours, you r the original designer. so how? we explain to him again so let him re-examine his assumption of the value of his pedagogical approach?

anyway i already finished remixing your and my same idea!

i made a duplicate so that there are 2 ways of thinking!
http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=1036msg3842;topicseen#msg3842
style 1 is our same idea
style 2 is his idea