diff --git a/cst337/lec/lec9.md b/cst337/lec/lec9.md
index 121b23c..3a6246a 100644
--- a/cst337/lec/lec9.md
+++ b/cst337/lec/lec9.md
@@ -82,19 +82,19 @@ For now we'll take two inputs and get 1 output, with a carry-output.
 
 Let's add 2 bits
 
-ab	|out
-00	|0
-01	|1
-10	|1
-11	|0
+|a|b|out|
+|0|0|0
+|0|1|1
+|1|0|1
+|1|1|0
 
 What about the carry bit however? What would _it_ look like given the preivous operations?
 
-ab	|carryout
-00	|0
-01	|0
-10	|0
-11	|1
+|a|b	|carryout
+|0|0	|0
+|0|1	|0
+|1|0	|0
+|1|1	|1
 
 Before what this implies note that the result of the carryout resembles
 
@@ -104,12 +104,12 @@ Two inputs, One output, One carry-out, One carry-in
 
 Here we'll add up `a & b`(inputs) and `c` carry-in
 
-cab		|output
-000		|0
-001		|1
-010		|1	
-011		|0
-100		|1
-101		|0
-110		|0
-111		|1
+|c|a|b		|output|
+|0|0|0		|0
+|0|0|1		|1
+|0|1|0		|1	
+|0|1|1		|0
+|1|0|0		|1
+|1|0|1		|0
+|1|1|0		|0
+|1|1|1		|1