Casio fx 991MS User Guide - Page 9

Two-line Display The two-line display makes it possible to view both the calculation formula and its result at the same time. • The upper line shows the calculation formula. • The lower line shows the result. A separator symbol is displayed every three digits when the integer part of the mantissa has more than three digits. Before getting started... k Modes Before starting a calculation, you must first enter the correct mode as indicated in the table below. • The following table shows the modes and required operations for the fx-95MS only. Users of other models should refer to the "User's Guide 2 (Additional Functions)" for information about modes and their selection. fx-95MS Modes To perform this type of calculation: Perform this To enter key operation: this mode: Basic arithmetic calculations F 1 COMP Standard deviation F 2 SD Regression calculations F 3 REG Solution of equations F F 1 EQN 7