i PLEASE NEED HELP WITH 4010 base five minus 1234 base 5!! please and thank you I know that the numbers add to more than five so they need to be different

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- Apr 11th 2012, 01:47 PMcathyharris4Bases
i PLEASE NEED HELP WITH 4010 base five minus 1234 base 5!! please and thank you I know that the numbers add to more than five so they need to be different

- Apr 11th 2012, 02:00 PMa tutorRe: Bases
I'd just use the usual method taught in schools, 'borrowing', but it's a little difficult to illustrate on here.

Instead you could use 'equal addition' as follows.

4010-1234

adding 1 to both numbers

=4011-1240

adding 10 to both numbers

=4021-1300

adding 200 to both numbers

=4221-2000

=2221

It's rather less efficient though. - Apr 11th 2012, 02:16 PMcathyharris4Re: Bases
is this base five then? and would I use the same method for all bases? thank you so much for your quick response :)

- Apr 11th 2012, 02:32 PMa tutorRe: Bases
Well, you said it was base 5...?

I wouldn't use the method I posted. I'd use 'borrowing'. Yes it works for any base. - Apr 11th 2012, 04:08 PMSorobanRe: Bases
Hello, cathyharris4!

Have you never**ever**done a subtraction in other bases?

Quote:

In C4, we can't subtract 4 from 0, so we "borrow" from C3.

The "1" we borrowed represents "5", so we have:

Subtract in C4 and we have:

In C3, we can't subtract 3 from 0, so we "borrow" from C2.

But C2 has "0"; we can't borrow.

So we must borrow from C1.

Now we can borrow from C2:

And we can complete the subtraction: