Add Or Subtract Weeks, Days, Hours, Minutes, Seconds60 seconds === 1 minute
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 time uses a multibase system of 60, 60, 24 and 7 to move from seconds through weeks. To do a calculation follow the following steps :
See also :  
 
 
