Leading zeros are never significant. The leftmost non-zero digit called the most significant digit, e.g. 00145 0.0052
• Imbedded zeros are always significant, e.g. 1020.045
• Trailing zeros are significant only if the decimal point is specified,
e.g. 12.2300 1500 120.0 90.
• A mark may be placed on the last trailing zero if it is significant, e.g. 54000