User manual CASIO FX-300ES PLUS

[. . . ] E fx-300ES 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 Using Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Specifying the Calculation Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Configuring the Calculator Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Inputting Expressions and Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Recurring Decimal Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Toggling Calculation Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Basic Calculations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Prime Factorization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Remainder Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Function Calculations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Statistical Calculations (STAT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Creating a Number Table from Two Functions (TABLE) . . . . . 25 Calculation Ranges, Number of Digits, and Precision. . . . . . . . 26 Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Before Assuming Malfunction of the Calculator. . . . . . . . . . . . . . . . . . 29 Replacing the Battery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Frequently Asked Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 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. 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. [. . . ] PreAns memory contents are cleared whenever the calculator enters another mode from the COMP Mode. To divide the result of 3 × 4 by 30 b 3*4= (Continuing) / 30 = 123 + 456 = 579 B 789 ­ 579 = 210 (Continuing) 123 + 456 = Math 789 -G= For Tk+2 = Tk+1 + Tk (Fibonacci sequence), determine the sequence from T1 to T5. B Math T1 = 1 1= (Ans = T1 = 1) Math T2 = 1 1= (Ans = T2 = 1, PreAns = T1 = 1) T3 = T2 + T1 = 1 + 1 G+SG(PreAns)= Math (Ans = T3 = 2, PreAns = T2 = 1) Math T4 = T3 + T2 = 2 + 1 = (Ans = T4 = 3, PreAns = T3 = 2) Math T5 = T4 + T3 = 3 + 2 Result: The sequence is {1, 1, 2, 3, 5}. = Variables (A, B, C, D, E, F, X, Y) Your calculator has eight preset variables named A, B, C, D, E, F, X, and Y. You can assign values to variables and also use the variables in calculations. To assign the result of 3 + 5 to variable A 3 + 5 1t(STO)y(A) 8 E-16 To multiply the contents of variable A by 10 (Continuing) Sy(A)* 10 = To recall the contents of variable A To clear the contents of variable A (Continuing) ty(A) 80 8 0 0 1t(STO)y(A) 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 add the result of 10 × 5 to M 0 1t(STO)l(M) (Continuing) 10 * 5 l 0 50 15 35 To subtract the result of 10 + 5 from M (Continuing) To recall the contents of M 10 + 5 1l(M­) tl(M) (Continuing) Note: Variable M is used for independent memory. Clearing the Contents of All Memories Ans memory, independent memory, and variable contents are retained even if you press A, change the calculation mode, or turn off the calculator. PreAns memory contents are retained even if you press A and turn off the calculator without exiting the COMP Mode. Perform the following procedure when you want to clear the contents of all memories. !9(CLR)2(Memory)=(Yes) Prime Factorization In the COMP Mode, you can factor a positive integer up to 10 digits into prime factors up to three digits. To perform prime factorization on 1014 1014 = !e(FACT) When you perform prime factorization on a value that includes a factor that is prime number with more than three digits, the part that cannot be factored will be enclosed in parentheses on the display. To perform prime factorization on 4104676 (= 22 × 10132) !e(FACT) Any one of the following operations will exit prime factorization result display. · Pressing any of the following keys: . · Using the setup menu to change the angle unit setting (Deg, Rad, Gra) or the display digits setting (Fix, Sci, Norm). E-17 Note: · You will not be able to execute prime factorization while a decimal value, fraction, or negative value calculation result is displayed. Trying to do so will cause a math error (Math ERROR). · You will not be able to execute prime factorization while the result of a calculation that uses Pol, Rec, ÷R is displayed. Remainder Calculations You can use the ÷R function in order to obtain the quotient and remainder in a division calculation. To calculate the quotient and remainder of 5 ÷ 2 Math B 5 !D(÷R) 2 = Quotient Remainder b 5 !D(÷R) 2 = Quotient Remainder Note: · Only the quotient value of a ÷R calculation is stored in Ans memory. · Assigning the result of a remainder division calculation to a variable will assign the quotient value only. Performing the operation 5 !D(÷R) 2 !t(STO))(X) (which assigns the result of 5÷R2 to X) will assign a value of 2 to X. · If a ÷R calculation is part of a multi-step calculation, only the quotient is passed on to the next operation. (Example: 10 + 17 !D (÷R) 6 = 10 + 2) · Operation of the f and e keys is disabled while a remainder division result is on the display. Cases when Remainder Division becomes Non-remainder Division If either of the following conditions exists when you perform a remainder division operation, the calculation will be treated as normal (non-remainder) division. · When either the dividend or the divisor is a very large value Example: 20000000000 !D(÷R) 17 = Calculated as: 20000000000 ÷ 17 · When the quotient is not a positive integer, or if the remainder is not a positive integer or positive fractional value Example: - 5 !D(÷R) 2 = Calculated as: ­5 ÷ 2 Function Calculations For actual operations using each function, see the "Examples" section following the list below. [. . . ] Important: Removing the battery will cause all of the calculator's memory contents to be deleted. Press 1A(OFF) to turn off the calculator. · To ensure that you do not accidentally turn on power while replacing the battery, slide the hard case onto the front of the calculator. Remove the cover as shown in the illustration and replace the battery, taking care that its plus (+) and minus (­) ends are facing correctly. [. . . ]