User manual CASIO FX-500ES

[. . . ] E fx-500ES User's Guide http://world. casio. com/edu/ RCA502127-001V01 CASIO Europe GmbH Bornbarch 10, 22848 Norderstedt, Germany About this Manual · The MATH mark indicates an example that uses Math format, while the LINE mark indicates Linear format. For details about input/output formats, see "Specifying the Input/Output Format". · Keycap markings indicate what a key inputs or what function it performs. · Pressing the 1 or S key followed by a second key performs the alternate function of the second key. [. . . ] Six variables named A, B, C, D, X, and Y can be used for storage of individual values. Independent Memory Variables This section uses the COMP Mode (N1) to demonstrate how you can use memory. k Answer Memory (Ans) Answer Memory Overview · Answer Memory contents are updated whenever you execute a calculation using any one of the following keys: =, 1=, m, 1m(M­), t, 1t(STO). · Answer Memory contents are not change if an error occurs during the current calculation. · Answer Memory contents are maintained even if you press the A key, change the calculation mode, or turn off the calculator. Using Answer Memory to Perform a Series of Calculations Example: To divide the result of 3 × 4 by 30 LINE 3*4= (Continuing)/30= Pressing / automatically inputs "Ans" command. · With the above procedure, you need to perform the second calculation immediately after the first one. If you need to recall Answer Memory contents after pressing A, press the G key. E-25 Inputting Answer Memory Contents into an Expression Example: To perform the calculations shown below: 123 + 456 = 579 789 ­ 579 = 210 LINE 123+456= 789-G= k Independent Memory (M) You can add calculation results to or subtract results from independent memory. The "M" appears on the display when independent memory contains a value. Independent Memory Overview · The following is a summary of the different operations you can perform using independent memory. To do this: Add the displayed value or result of the expression to independent memory Subtract the displayed value or result of the expression from independent memory Recall current independent memory contents Perform this key operation: m 1m(M­) tm(M) · You can also insert the M variable into a calculation, which tells the calculator to use the current independent memory contents at that location. Sm(M) · The "M" indicator appears in the upper left of the display when there is any value other than zero stored in independent memory. · Independent memory contents are maintained even if you press the A key, change the calculation mode, or turn off the calculator. E-26 Calculation Examples Using Independent Memory · If the "M" indicator is on the display, perform the procedure under "Clearing Independent Memory" before performing this example. Example: 23 + 9 = 32 23+9m 53 ­ 6 = 47 53-6m ­)45 × 2 = 90 45*21m(M­) 99 ÷ 3 = 33 99/3m (Total) 22 tm(M) Clearing Independent Memory Press01t(STO)m. This clears independent memory and causes the "M" indicator to disappear from the display. k Variables (A, B, C, D, X, Y) Variable Overview · You can assign a specific value or a calculation result to a variable. 3+51t(STO)y(A) · Use the following procedure when you want to check the contents of a variable. Example: To recall the contents of variable A ty(A) · The following shows how you can include variables inside of an expression. Example: To multiply the contents of variable A by the contents of variable B Sy(A)*Se(B)= · Variable contents are maintained even if you press the A key, change the calculation mode, or turn off the calculator. Appendix <#015> Clearing the Contents of a Specific Variable Press 01t(STO) and then press the key for the name of the variable whose contents you want to clear. To clear the contents of variable A, for example, press 01t(STO)y(A). k Clearing the Contents of All Memories Use the following procedure to clear the contents of Answer Memory, independent memory, and all of the variables. · To cancel the clear operation without doing anything, press A(Cancel) instead of =. E-27 Function Calculations This section explains how to use the calculator's built-in functions. The functions available to you depends on the calculation mode you are in. The explanations in this section are mainly about the functions that are available in all calculation modes. All of the examples in this section show operation in the COMP Mode (N1). · Certain function calculations may take some time to display calculation results. Before performing an operation, be sure to wait until execution of the current operation is complete. [. . . ] For more information, see "Displaying the Location of an Error". · Pressing A clears the calculation expression you input before the error message appeared. Note that in this case, the original calculation will not be retained in calculation history memory. Math ERROR · Cause · The intermediate or final result of the calculation you are performing exceeds the allowable calculation range. E-49 · Your input exceeds the allowable input range (particularly when using functions). · The calculation you are performing contains an illegal mathematical operation (such as division by zero). [. . . ]