i cant understand how it works:(adsbygoogle = window.adsbygoogle || []).push({});

i have two bit numbers (x1 x0 ,y1 y0) which are needed to be subtructed

i cant understand why

x1 x0 y1 y0 | B D1 D2

0 0 0 1 | 1 1 0

0 0 1 0 | 1 0 1

0 0 1 1 | X X X

i cant understand these arithmetics

the first one is 0-1=-1

so in base 3 the resolt is should be three but i cant understand what meen Borrow=1

and the resolt 10

i dont understand how did they desided that

and why we have dont cares on the third example

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: A Question About Base 3 Subtruction

**Physics Forums | Science Articles, Homework Help, Discussion**