Wikipedia sayings about when reporting the answer to a mathematical calculation involving addition or subtraction, how does one determine the number of significant digits to report in the answer?
1.List of Egyptian inventions and discoveries
problem of the Moscow Mathematical Papyrus asks for a calculation of the surface area of a hemisphere (Struve, Gillings) or possibly the area of a semi-cylinder
2.General der Nachrichtenaufklärung
deal of non-carrying addition or subtraction had to be done. Note: little information is available from TICOM as to how this device functioned. The Finnish