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. · In no event shall CASIO Computer Co. , Ltd. [. . . ] While a calculation result is displayed, press !&('%). Percent display can be up to 10 digits long. 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. Pressing !&('%) again displays the decimal fraction value. · 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. You also can convert between sexagesimal and decimal. 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. You can scroll through calculation history contents using f and c. 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. [. . . ] If the calculator discovers any abnormality, it automatically clears memory contents. For details about initialized settings, see "Configuring the Calculator Setup". Initialize all settings by performing the following operation: r1(Setup) =(Yes). E-16 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. [. . . ]