pg. 239 excerpt -->

According to the first statement doesn’t a, b substitute 10, 11 respectively therefore eliminating the use of integers 10 - 15?

pg. 239 excerpt -->

According to the first statement doesn’t a, b substitute 10, 11 respectively therefore eliminating the use of integers 10 - 15?

Hex a is the equivalent of 10 decimal, but 10 hex is the equivalent of 16 decimal (1 in the sixteens column, 0 in the ones column).