Add/Subtract Miles, Kilometers, Furlongs, Yards, Feet, Inches
12 inches === 1 foot
The decimal measuring system uses 100 to advance from centimeters to Meters and 1,000 to advance to Kilometers.
The process of adding and subtracting lengths uses a multi-base system of 12, 3, 220, 5 and 1.6 to move from inches through miles.
To do a calculation follow the following steps :-
See also >> Multiply/Divide Time