Definition:Classical Algorithm/Primitive Subtraction/Base 10 Subtraction Table

Definition
The primitive subtraction operation for conventional base $10$ arithmetic on two $1$-digit integers can be presented as a pair of operation tables as follows:


 * $\begin{array}{c|cccccccccc}

d & 0 & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 \\ \hline 0 & 0 & 9 & 8 & 7 & 6 & 5 & 4 & 3 & 2 & 1 \\ 1 & 1 & 0 & 9 & 8 & 7 & 6 & 5 & 4 & 3 & 2 \\ 2 & 2 & 1 & 0 & 9 & 8 & 7 & 6 & 5 & 4 & 3 \\ 3 & 3 & 2 & 1 & 0 & 9 & 8 & 7 & 6 & 5 & 4 \\ 4 & 4 & 3 & 2 & 1 & 0 & 9 & 8 & 7 & 6 & 5 \\ 5 & 5 & 4 & 3 & 2 & 1 & 0 & 9 & 8 & 7 & 6 \\ 6 & 6 & 5 & 4 & 3 & 2 & 1 & 0 & 9 & 8 & 7  \\ 7 & 7 & 6 & 5 & 4 & 3 & 2 & 1 & 0 & 9 & 8  \\ 8 & 8 & 7 & 6 & 5 & 4 & 3 & 2 & 1 & 0 & 9  \\ 9 & 9 & 8 & 7 & 6 & 5 & 4 & 3 & 2 & 1 & 0  \\ \end{array} \qquad \begin{array}{c|cccccccccc} c & 0 & 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 \\ \hline 0 & 0 & 1 & 1 & 1 & 1 & 1 & 1 & 1 & 1 & 1 \\ 1 & 0 & 0 & 1 & 1 & 1 & 1 & 1 & 1 & 1 & 1 \\ 2 & 0 & 0 & 0 & 1 & 1 & 1 & 1 & 1 & 1 & 1 \\ 3 & 0 & 0 & 0 & 0 & 1 & 1 & 1 & 1 & 1 & 1 \\ 4 & 0 & 0 & 0 & 0 & 0 & 1 & 1 & 1 & 1 & 1 \\ 5 & 0 & 0 & 0 & 0 & 0 & 0 & 1 & 1 & 1 & 1 \\ 6 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 1 & 1 & 1 \\ 7 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 1 & 1 \\ 8 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 1 \\ 9 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 & 0 \\ \end{array}$