User manual CASIO FX-82LB

[. . . ] If accidentally swallowed, consult with a physician immediately. · Never charge batteries, try to take batteries apart, or allow batteries to become shorted. Never expose batteries to direct heat or dispose of them by incineration. · Misuse of batteries can cause them to leak and damage nearby items, and can create the risk of fire and personal injury. [. . . ] Pressing [ again back steps sequentially (new-to-old) through past calculations. · Pressing the e or r key while a replay memory calculation is on the display changes to the editing screen. · Pressing the e or r key immediately after you finish a calculation displays the editing screen for that calculation. · Pressing t does not clear replay memory, so you can recall the last calculation even after you press t. · Replay memory capacity is 128 bytes for storage of both expressions and results. · Replay memory is cleared by any of the following actions. When you press the 5 key When you initialize modes and settings by pressing A B 2(or 3) = When you change from one calculation mode to another When you turn off the calculator. k Error Locator · Pressing r or e after an error occurs displays the calculation with the cursor positioned at the location where the error occurred. k Multi-statements A multi-statement is an expression that is made up of two or more smaller expressions, which are joined using a colon ( : ). · Example: To add 2 + 3 and then multiply the result by 4 2+3 p\g- 4= 2+3 5. 20. Disp = Ans×4 E-9 k Exponential Display Formats This calculator can display up to 10 digits. Larger values are automatically displayed using exponential notation. In the case of decimal values, you can select between two formats that determine at what point exponential notation is used. · Answer Memory contents are not updated if the operation performed by any of the above key operations results in an error. k Consecutive Calculations · You can use the calculation result that is currently on the display (and also stored in Answer Memory) as the first value of your next calculation. Note that pressing an operator key while a result is displayed causes the displayed value to change to Ans, indicating it is the value that is currently stored in Answer Memory. · The result of a calculation can also be used with a subsequent Type A function (x2, x3 , x­1 , x!, DRG'), +, ­, ^(xy), x , , Ö, nPr and nCr. E-16 k Independent Memory · Values can be input directly into memory, added to memor y, or subtracted from memory. Independent memory is convenient for calculating cumulative totals. · Independent memory uses the same memory area as variable M. · To clear independent memory (M), input 0 A j 3. · Example: 23 53 ) 45 9 6 2 32 47 90 ­11 23 + 9 A j 3 53 , 6 | 45 - 2 A { (Total) 03 k Variables · There are nine variables (A through F, M, X and Y), which can be used to store data, constants, results, and other values. · Use the following operation to delete data assigned to a particular variable: 0 A j 1. This operation deletes the data assigned to variable A. · Perform the following key operation when you want to clear the values assigned to all of the variables. A B 1(Mcl) = · Example: 193. 2 Ö 23 193. 2 Ö 28 8. 4 6. 9 193. 2 A j 1 \ 23 = p 1 \ 28 = E-17 Scientific Function Calculations COMP Use the F key to enter the COMP Mode when you want to perform basic arithmetic calculations. [. . . ] · Action · Press e or r to display the calculation with the cursor located at the location of the error and make required corrections. Arg ERROR · Cause · Improper use of an argument · Action · Press e or r to display the location of the cause of the error and make required corrections. E-29 k Order of Operations Calculations are performed in the following order of precedence. 1 Coordinate transformation: Pol (x, y), Rec (r, ) 2 Type A functions: With these functions, the value is entered and then the function key is pressed. x3, x2 , x 1, x!, ° ' " m, m1, m2 , n Angle unit conversions (DRG') 3 Powers and roots: ^ (xy), x 4 a b/c 5 Abbreviated multiplication format in front of , e (natural logarithm base), memory name, or variable name: 2, 3e, 5A, A, etc. 6 Type B functions: With these functions, the function key is pressed and then the value is entered. [. . . ]