diff --git a/modules/arithmetic-promotion-and-conversions.md b/modules/arithmetic-promotion-and-conversions.md
index 17bb704c..98314742 100644
--- a/modules/arithmetic-promotion-and-conversions.md
+++ b/modules/arithmetic-promotion-and-conversions.md
@@ -27,9 +27,9 @@ example:
 
 ```C
 int i;
-unsigned long long ll;
+unsigned long long ull;
 
-i + ll;		// type of the result is unsigned long long and 'i'
+i + ull;	// type of the result is unsigned long long and 'i'
 		// is converted to unsigned long long BEFORE '+' is
 		// applied.  See below what happens if 'i' contains a
 		// negative number.
@@ -61,7 +61,7 @@ sizeof (c + 1)	// is	4
 ```
 
 Note that we already know that `c` is **never** modified as the expression in
-`sizeof` is never evaluated.  See the 
+`sizeof` is never evaluated.  See the
 #module sizeof.md sizeof module
 for to review the knowledge.
 
@@ -407,18 +407,18 @@ variables:
  * incorporate into the C code, compile, and verify you got it right.
  */
 
-unsigned long long ll = -13;            // Use %llu in printf() to verify.
-signed char c = 999;                    // %d
-short int si = -1;                      // %hd
-unsigned int = -1;                      // %u
-unsigned short int usi = 999999;        // %hu
-signed char c = 0 ? -10 : 0U;           // %d
-signed char c = -1 ? -10 : 0U;          // %d
-long long ll = 1U + -10;                // %lld
-unsigned long long ull = 1U + -10;      // %llu
-unsigned short int si = INT_MIN + 13LU; // %hu
-unsigned short int si = -INT_MAX + 13U; // %hu
-signed char c = 129;                    // %d
+unsigned long long ull = -13;            // Use %llu in printf() to verify.
+signed char sc = 999;                    // %d
+short int si = -1;                       // %hd
+unsigned int ui = -1;                    // %u
+unsigned short int usi = 999999;         // %hu
+signed char sc = 0 ? -10 : 0U;           // %d
+signed char sc = -1 ? -10 : 0U;          // %d
+long long ll = 1U + -10;                 // %lld
+unsigned long long ull = 1U + -10;       // %llu
+unsigned short int usi = INT_MIN + 13LU; // %hu
+unsigned short int usi = -INT_MAX + 13U; // %hu
+signed char sc = 129;                    // %d
 
 /* What is printed? */
 printf("%hhu\n", -3);