Contract an addition and multiplication table on number base 11

1. Addition Table (Base 11)
When the sum of two digits is 11 or greater, we convert the sum to base 11. For example, $9 + 3 = 12_{10} = 1 \times 11^1 + 1 \times 11^0 = 11_{11}$. Also, $A + 1 = 10 + 1 = 11_{10}