Multiplication Problem

vvr1590 · Senior Member

Multiplication Problem

langris5 · Senior Member

2155 * 26=2155*2*13=4310*13=56030

that's the way i'd do it, but i agree w/you vinay,i'd skip that problem right away and come back when i have time.

quincy

vvr1590 · Senior Member

well, now I think i've figured out an easier way, let's see if this works...

for multiplication by 2155, divide by thirteen and then multiply by 28015.

So 13 * 2155 would be 28015

and 26 * 2155 would be 56030

and 39 *2155 would be 94045

and so on

what do you think?

vinay

Date: Mar 25, 2005

yep...so far it works for everything, but it should be 84045 for the last one

great job!

quincy