User manual CASIO FX-83GT 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] · You cannot switch from decimal form to mixed fraction form if the total number of digits used in the mixed fraction (including integer, numerator, denominator, and separator symbols) is greater than 10. Note: With Natural Display (MathO), pressing instead of after inputting a calculation will display the calculation result in decimal form. Pressing after that will switch the calculation result to recurring decimal form, fraction form or form. The form of the result will not appear in this case. Basic Calculations Fraction Calculations Note that the input method for fractions is different, depending upon whether you are using Natural Display or Linear Display. 2+1=7 3 2 6 or 2 2 3 2 4-3 1=1 2 2 4 ( 4 3 )3 3 3 1 1 1 1 1 2 2 2 2 2 7 6 7 6 76 1 2 12 Note: · Mixing fractions and decimal values in a calculation while Linear Display is selected will cause the result to be displayed as a decimal value. · Fractions in calculation results are displayed after being reduced to their lowest terms. To switch a calculation result between improper fraction and mixed fraction form: Perform the following key operation: ( ) To switch a calculation result between fraction and decimal form: Press . Percent Calculations Inputting a value and pressing become a percent. 150 20% = 30 150 (%) causes the input value to 20 (%) 30 75 2875 Calculate what percentage of 880 is 660. (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. 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. [. . . ] Action: Input only integers for the argument. Before Assuming Malfunction of the Calculator. . . Perform the following steps whenever an error occurs during a calculation or when calculation results are not what you expected. Note that you should make separate copies of important data before performing these steps. Check the calculation expression to make sure that it does not contain any errors. Make sure that you are using the correct mode for the type of calculation you are trying to perform. [. . . ]