Letter T
The letter T symbolizes a way of subtracting the values, if we have a number with two digits. To get another number.
In contrast to the letter P , which adds them up.
An example:
For the number of two digits ... 25, we should subtract from digit 2 the digit 5. Obtaining the new number 23. And so on. successively.
For the number ... 52, we should subtract from digit 2 the digit 5. Getting the new number 32. And so on successively.
