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Compute $14A6_{12} - 5B9_{12}$. Give your answer as a base $12$ integer.

(You do not need to include the subscript to indicate the base.)

Mellie  Jun 3, 2015

Best Answer 

 #1
avatar+78618 
+15

   14A612

     -  5B912

     ----------

       AA912 or just AA9 without the subscript

 

 

CPhill  Jun 4, 2015
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2+0 Answers

 #1
avatar+78618 
+15
Best Answer

   14A612

     -  5B912

     ----------

       AA912 or just AA9 without the subscript

 

 

CPhill  Jun 4, 2015
 #2
avatar+91001 
+10

Thanks Chris

 

$$\begin{array}{rlllll}
&3&^19&&\\
1&\not{4}&\not{A}&^16&_{12}\quad&\mbox{Take 12 from the 2nd column 12+6-9=9 etc}\\
&5&B&9&_{12}\quad&\mbox{12+9-11=10=A}\\
&&&&\quad&\mbox{12+3-5=10=A}\\\\\hline
&A&A&9&_{12}\\
\end{array}$$

 

Do you understand Mellie ?     I have done this like an ordinary subtraction  

Melody  Jun 4, 2015

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