User manual CASIO FX-912MS

[. . . ] fx-95MS fx-100MS fx-115MS (fx-912MS) fx-570MS fx-991MS User's Guide kfx-912MS owners Please be sure to read the important notice of this manual. E http://world. casio. com/edu_e/ CASIO ELECTRONICS CO. , LTD. Unit 6, 1000 North Circular Road, London NW2 7JD, U. K. Removing and Replacing the Calculator's Cover · Before starting . . . . . 1 Holding the cover as shown in the illustration, slide the unit out of the cover. · After you are finished . . . . . 2 Holding the cover as shown in the illustration, slide the unit out of the cover. · Always slide the keyboard end of the unit into the cover first. [. . . ] fx-95MS: 1 Other Models: 1 r · Press the number key ( 1 or 2) that corresponds to the setting you want to use. 1(a b/c): Mixed fraction 2(d/c): Improper fraction 13 · An error occurs if you try to input a mixed fraction while the d/c display format is selected. k Percentage Calculations · Example 1 : To calculate 12% of 1500 (180) 1500 - 12 A v · Example 2: To calculate what percentage of 880 is 660 (75%) 660 \ 880 A v · Example 3 : To add 15% onto 2500 (2875) 2500 - 15 A v + · Example 4 : To discount 3500 by 25% (2625) 3500 - 25 A v , · Example 5: To discount the sum of 168, 98, and 734 by 20% (800) 168 + 98 + 734 = g A j 1 p 1 - 20 A v , * As shown here, if you want to use the current Answer Memory value in a mark up or discount calculation, you need to assign the Answer Memory value into a variable and then use the variable in the mark up/discount calculation. This is because the calculation performed when v is pressed stores a result to Answer Memory before the , key is pressed. · Example 6: If 300 grams are added to a test sample originally weighing 500 grams, what is the percentage increase in weight?(160%) 300 + 500 A v · Example 7: What is the percentage change when a value is increased from 40 to 46?(15%, 20%) 46 , 40 A v eeeeee8= 14 * k Degrees, Minutes, Seconds Calculations · You can perform sexagesimal calculations using degrees (hours), minutes, and seconds, and convert between sexagesimal and decimal values. · Example 1: To convert the decimal value 2. 258 to a sexagesimal value and then back to a decimal value 2. 258 = 2. 258 2°15°28. 8 2. 258 AO I · Example 2: To perform the following calculation: 12°34'56" 3. 45 12 I 34 I 56 I - 3. 45 = 43°24°31. 2 k FIX, SCI, RND · To change the settings for the number of decimal places, the number of significant digits, or the exponential display format, press the F key a number of times until you reach the setup screen shown below. F i x Sc i No r m 1 2 3 · Press the number key ( 1, 2, or 3) that corresponds to the setup item you want to change. 1 (Fix): Number of decimal places 2 (Sci): Number of significant digits 3 (Norm): Exponential display format · Example 1: 200 Ö 7 14 200 \ 7 - 14 = (Specifies three decimal places. ) 400. 00 FIX F. . . . . 1(Fix) 3 15 400. 00000 (Internal calculation continues using 12 digits. ) 200 \ 7 = 28. 57100 400. 00000 - 14 = The following performs the same calculation using the specified number of decimal places. 200 \ 7 = (Internal rounding) 28. 57100 28. 57100 399. 99400 AQ - 14 = · Press F . . . . . 3(Norm) 1 to clear the Fix specification. · Example 2: 1 Ö 3, displaying result with two significant digits (Sci 2) F. . . . . 2(Sci) 2 1 \ 3 = SCI 3. 3­01 · Press F . . . . . 3(Norm) 1 to clear the Sci specification. Memory Calculations COMP Use the F key to enter the COMP Mode when you want to perform a calculation using memory. COMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F 1 k Answer Memory · Whenever you press = after inputting values or an expression, the calculated result automatically updates Answer Memory contents by storing the result. · In addition to =, Answer Memory contents are also updated with result whenever you press A v, |, A {, or A j followed by a letter (A through F, or M, X, or Y). 16 · You can recall Answer Memory contents by pressing g. · Answer Memory can store up to 12 digits for the mantissa and two digits for the exponent. · 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. k Independent Memory · Values can be input directly into memory, added to memory, or subtracted from memory. Independent memory is convenient for calculating cumulative totals. · Independent memory uses the same memory area as variable M. [. . . ] · When a calculation contains an argument that is a negative number, the negative number must be enclosed within parentheses. The negative sign (­) is treated as a Type B function, so particular care is required when the calculation includes a high-priority Type A function, or power or root operations. Example: ( ­2)4 = 16 ­24 = ­16 k Stacks This calculator uses memory areas, called "stacks, " to temporarily store values (numeric stack) and commands (command stack) according to their precedence during calculations. The numeric stack has 10 levels and the command stack has 24 levels. [. . . ]