- The following decimal numbers are stored in excess-50 floating point format, with the decimal point to the left of the first mantissa digit. A 9 is used as a negative sigr - 05025031 - 94933300 1. Add them. Present your result in excess-50 standard floating point format and validate it using the decimal sign-and-magnitude notation. (Mark=10\%) 2. Multiply them. Present your result in excess-50 standard floating point format and validate it using decimal sign-and-magnitude notation. (Mark=10\%)