User manual CASIO FX-85GT PLUS

[. . . ] E fx-83GT PLUS fx-85GT PLUS User's Guide CASIO Worldwide Education Website http://edu. casio. com CASIO EDUCATIONAL FORUM http://edu. casio. com/forum/ Contents Important Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Sample Operations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Initializing the Calculator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] (2875) 2500 2500 (%) 15 (%) Discount 3500 by 25%. (2625) 3500 3500 25 (%) 2625 E-14 Degree, Minute, Second (Sexagesimal) Calculations Performing an addition or subtraction operation between sexagesimal values, or a multiplication or division operation between a sexagesimal value and a decimal value will cause the result to be displayed as a sexagesimal value. You also can convert between sexagesimal and decimal. The following is the input format for a sexagesimal value: {degrees} {minutes} {seconds} . Note: You must always input something for the degrees and minutes, even if they are zero. 2°20´30 + 39´30 = 3°00´00 2 20 30 0 39 30 3°0´0 2°15´18 2. 255 2°15´18 Convert 2°15´18 to its decimal equivalent. 2 15 18 (Converts sexagesimal to decimal. ) (Converts decimal to sexagesimal. ) Multi-Statements You can use the colon character (:) to connect two or more expressions and execute them in sequence from left to right when you press . 3+3:3 3 3 3 (:) 3 3 6 9 Using Engineering Notation A simple key operation transforms a displayed value to engineering notation. Transform the value 1234 to engineering notation, shifting the decimal point to the right. 1234 1234 1. 234×103 1234×100 Transform the value 123 to engineering notation, shifting the decimal point to the left. 123 123 () 0. 123×103 ( ) 0. 000123×106 Calculation History In the COMP Mode, the calculator remembers up to approximately 200 bytes of data for the newest calculation. You can scroll through calculation history contents using and . 1+1=2 2+2=4 1 2 1 2 2 4 E-15 3+3=6 3 3 (Scrolls back. ) (Scrolls back again. ) 6 4 2 Note: Calculation history data is all cleared whenever you press , when you change to a different calculation mode, when you change the display format, or whenever you perform any reset operation. Replay While a calculation result is on the display, you can press the expression you used for the previous calculation. 4 × 3 + 2. 5 = 14. 5 4 × 3 - 7. 1 = 4. 9 4 (Continuing) 3 or to edit 2. 5 7. 1 14. 5 4. 9 Note: If you want to edit a calculation when the indicator is on the right side of a calculation result display (see "Reading the Display"), press and then use and to scroll the calculation. Answer Memory (Ans) The last calculation result obtained is stored in Ans (answer) memory. Ans memory contents are updated whenever a new calculation result is displayed. To divide the result of 3 4 by 30 3 (Continuing) 4 30 123 + 456 = 579 789 ­ 579 = 210 (Continuing) 123 456 789 Variables (A, B, C, D, E, F, X, Y) Your calculator has eight preset variables named A, B, C, D, E, F, X, and Y. You can assign values to variables and also use the variables in calculations. To assign the result of 3 + 5 to variable A 3 5 To multiply the contents of variable A by 10 (Continuing) To recall the contents of variable A To clear the contents of variable A (STO) (A) 8 80 (A) 10 (A) (A) (Continuing) 0 (STO) 8 0 E-16 Independent Memory (M) You can add calculation results to or subtract results from independent memory. The "M" appears on the display when there is any value other than zero stored in independent memory. To clear the contents of M To add the result of 10 5 to M 0 (Continuing) (STO) 10 5 (M) 0 50 15 35 To subtract the result of 10 + 5 from M (Continuing) To recall the contents of M 10 5 (M­) (M) (Continuing) Note: Variable M is used for independent memory. Clearing the Contents of All Memories Ans memory, independent memory, and variable contents are retained even if you press , change the calculation mode, or turn off the calculator. Perform the following procedure when you want to clear the contents of all memories. (CLR) (Memory) (Yes) Prime Factorization In the COMP Mode, you can factor a positive integer up to 10 digits into prime factors up to three digits. To perform prime factorization on 1014 1014 (FACT) When you perform prime factorization on a value that includes a factor that is prime number with more than three digits, the part that cannot be factored will be enclosed in parentheses on the display. [. . . ] If the calculator discovers any abnormality, it automatically initializes the calculation mode and clears memory contents. For details about initialized settings, see "Configuring the Calculator Setup". Initialize all modes and settings by performing the following operation: (CLR) (Setup) (Yes). E-29 Replacing the Battery A low battery is indicated by a dim display, even if contrast is adjusted, or by failure of figures to appear on the display immediately after you turn on the calculator. If this happens, replace the battery with a new one. [. . . ]