Binary Arithmetic Examples

Try doing the problem in your head (or on scratch paper). Then scroll down to see the answers.

 
111
+
100

 

 

 
001
+
111

 

 

 
001
+
010

 

 

 
101
+
101

 

Answers:

  1 ←carried digits
 
111
 
+
100
 

 
1011
 

 

  111 ←carried digits
 
001
 
+
111
 

 
1000
 

 

    ←carried digits
 
001
 
+
010
 

 
011
 

 

  1 1 ←carried digits
 
101
 
+
101
 

 
1010