5. 28 + 36 - 54 31 72 + 28 -- 86 54 - 93 70

1. 
   

   
   $$
   \begin{array}{r}
   +\begin{array}{r}28\\36 \\
   \hline
   64
   \end{array}
   \end{array}
   $$
   

   
   


2. 
   

   
   $$
   \begin{array}{r}
   -\begin{array}{r}54\\31 \\
   \hline
   23
   \end{array}
   \end{array}
   $$
   

   
   


3. 
   

   
   $$
   \begin{array}{r}
   +\begin{array}{r}72\\28 \\
   \hline
   100
   \end{array}
   \end{array}
   $$
   

   
   


4. 
   

   
   $$
   \begin{array}{r}
   -\begin{array}{r}86\\54 \\
   \hline
   32
   \end{array}
   \end{array}
   $$
   

   
   


5. 
   

   
   $$
   \begin{array}{r}
   -\begin{array}{r}93\\70 \\
   \hline
   23
   \end{array}
   \end{array}
   $$
   

   
   

Ответ: 64, 23, 100, 32, 23.