User manual CASIO FX-55 PLUS

[. . . ] E fx-55 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Handling Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Removing the Hard Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Turning Power On and Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Adjusting Display Contrast . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Key Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Reading the Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Configuring the Calculator Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Inputting Expressions and Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Toggling Calculation Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Basic Calculations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Remainder Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Function Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Calculation Ranges, Number of Digits, and Precision. . . . . . . . 14 Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Before Assuming Malfunction of the Calculator. . . . . . . . . . . . . . . . . 16 Replacing the Battery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Frequently Asked Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 E-1 Important Information · The displays and illustrations (such as key markings) shown in this User's Guide are for illustrative purposes only, and may differ somewhat from the actual items they represent. · The contents of this manual are subject to change without notice. be liable to anyone for special, collateral, incidental, or consequential damages in connection with or arising out of the purchase or use of this product and items that come with it. [. . . ] To switch a calculation result between fraction and decimal form: Press F. E-8 Percent Calculations Inputting a value and pressing & causes the input value to become a percent. 150 × 20% = 30 150 * 20 &= 30 Calculate what percentage of 880 is 660. (2625) 3500 - 3500 * 25 &= 75 2875 2625 Percent Conversion Calculation results can be converted to a percent. Pressing !&('%) again returns the calculation result to its original display format. 1 + 2 = 3 = 300% 1 + 2 =!&('%) !&('%) 300% 3 1 ÷ 3 = 0. 33 = 33. 33% (Fix 2) sd(Fix)c 1 / 3 =!&('%) 33. 33% 4 2 + = 146. 6666667% 5 3 4 ' 5 e+ 2 ' 3 =!&('%) ' = 141. 4213562% 2 !2 =!&('%) 1°2´3 = 103. 4166667% 1 e 2 e 3 e=!&('%) 146. 6666667% 141. 4213562% 103. 4166667% · When the number of display digits is specified by Fix, the value is converted to a percent and then adjusted to the specified number of digits. The number of display digits setting is not applied to the value stored in Ans memory. · When MathO is selected as the display format and the calculation result is a fraction, root ('), or pi (), the result is converted to a decimal fraction and then to a percent. · When the calculation result is a sexagesimal value (degrees, minutes, seconds), it is converted to a decimal value and then to a percent. · Percent conversion cannot be performed on the result of a remainder calculation (÷R). 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 E-9 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 $= Convert 2°15´18 to its decimal equivalent. 2 $ 15 $ 18 $= (Converts sexagesimal to decimal. ) $ (Converts decimal to sexagesimal. ) $ 3°0´0 2°15´18 2. 255 2°15´18 Calculation History The calculator remembers up to approximately 200 bytes of data for the newest calculation. 1+1=2 2+2=4 3+3=6 1+1= 2+2= 3+3= (Scrolls back. ) f (Scrolls back again. ) f 2 4 6 4 2 Note: Calculation history data is all cleared whenever you press O, 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 d or e to edit the expression you used for the previous calculation. 4 × 3 + 2. 5 = 14. 5 L 4 * 3 + 2. 5 = 4 × 3 - 7. 1 = 4. 9 (Continuing) dYYYY- 7. 1 = 14. 5 4. 9 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 L 3*4= Math (Continuing) / 30 = E-10 123 + 456 = 579 789 ­ 579 = 210 (Continuing) 123 + 456 = Math 789 -G= 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 assign the result of 2 + 8 to M To add the result of 10 × 5 to M (Continuing) 0S 2+8S 10 * 5 l 0 10 50 To subtract the result of 10 + 5 from M (Continuing) 10 + 5 m To recall the contents of M (Continuing) M 15 45 Note: You also can call M and use it in a calculation you are inputting. Clearing the Contents of All Memories Ans memory and independent memory contents are retained even if you press A, or turn off the calculator. Perform the following procedure when you want to clear the contents of all memories. r2(Memory)=(Yes) Remainder Calculations You can use the ÷R function in order to obtain the quotient and remainder in a division calculation. [. . . ] Syntax ERROR Cause: There is a problem with the format of the calculation you are performing. Argument ERROR Cause: A non-integer argument was input for the random number function (RanInt#). Can't Simplify Cause: Attempting to simplify a fraction using a divisor that cannot be simplified. Action: Input a divisor that can be simplified. 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. [. . . ]