title: how to use negative numbers as one in assembly?
body: <p>I have a arithmetic program in assembly, but when i add, subtract, multiply negative numbers, it will not result in desired output.</p>
  
  <p>For Example</p>
  
  <p>input:</p>
  
  <pre><code>-1+2=66675 (should be 1)
  
  -1-1=656745 (should be -2)
  
  -1*-1=66757 (should be 1) 
  </code></pre>
  
  <p><strong>Questions:</strong></p>
  
  <ul>
  <li><p>how would i treat (-) and (1) as one?</p></li>
  <li><p>how to do arithmetic operation in signed numbers?</p></li>
  </ul>
  
  <p>any advice please ...</p>