The decimal counting system uses a uniform '10' to advance from 0 through 10, through 100, through 1000 etc.
The process of adding and subtracting weights uses a multi-base system of 16, 14, 2, 4 and 20 to move from Ounces; through Pounds; through Stones; through Quarters; through Tons, respectively.
To do a calculation follow the following steps :-
Select Add or Subtract to add or subtract components.
Input the number of components to add or subtract.
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