User manual CASIO FX-220 PLUS

[. . . ] fx-82MS fx-82SX PLUS fx-85MS fx-220 PLUS fx-300MS fx-350MS User's Guide CASIO Worldwide Education Website E · Never try to take the calculator apart. · Use a soft, dry cloth to clean the exterior of the calculator. · Whenever discarding the calculator or batteries, be sure to do so in accordance with the laws and regulations in your particular area. * Company and product names used in this manual may be registered trademarks or trademarks of their respective owners. k Initializing Calculator Settings Perform the following procedure to initialize the calculator, which returns the calculation mode to COMP and returns all other settings, including setup menu settings, to their initial defaults. [. . . ] Outside the specified range, results are displayed using exponential format. Norm 1: 10­2 |x|, |x| 1010 Norm 2: 10­9 |x|, |x| 1010 Example: 1 ÷ 200 = 5 × 10­3 (Norm 1); 0. 005 (Norm 2) b e d 4. Safety Precautions Battery · Keep batteries out of the reach of small children. · Use only the type of battery specified for this calculator in this manual. Note: · Mixing fractions and decimal values in a calculation will cause the result to be displayed as a decimal value. · Fractions in calculation results are displayed after being reduced to their lowest terms. To switch a calculation result between improper fraction and mixed fraction format: Press 1$(d/c). To switch a calculation result between fraction and decimal format: Press $. 12. nPr, nCr : Permutation (nPr) and combination (nCr) functions. 210. Rnd : The argument of this function is made a decimal value and then rounded in accordance with the current number of display digits setting (Norm, Fix, or Sci). Note: Using functions can slow down a calculation, which may delay display of the result. To interrupt an ongoing calculation before its result appears, press A. k Percent Calculations 150 × 20% = 30 150 * 20 1=(%) 30. 2625. k Variables (A, B, C, D, E, F, X, Y) (fx-82MS/85MS/300MS/350MS only) Your calculator has eight preset variables named A, B, C, D, E, F, X, and Y. To assign the result of 3 + 5 to variable A 3 + 5 1t(STO)y(A) To multiply the contents of variable A by 10 (Continuing) Sy(A)* 10 = To recall the contents of variable A (Continuing) ty(A) To clear the contents of variable A 0 1t(STO)y(A) 5. Handling Precautions · Dim figures on the display of the calculator indicate that battery power is low. Continued use of the calculator when the battery is low can result in improper operation. Replace the battery as soon as possible when display figures becomes dim. Even if the calculator is operating normally, replace the battery at least once every two years (fx-82MS/82SX PLUS/220 PLUS), or three years (fx-85MS/300MS/350MS). A dead battery can leak, causing damage to and malfunction of the calculator. 32 = 2 To calculate ' × 3 (= 3' = 4. 242640687. . . ) to three 2 2 decimal places (Fix 3) N 1(Fix)3 12*3= 4. 243 5 k Data Input Precautions · While inputting data or after inputting data is complete, you can use the f and c keys to scroll through data you have input. If you input multiple entries of the same data using !, (;) (!)(;) on the fx-82SX PLUS/220 PLUS) to specify the data frequency (number of data items) as described above, scrolling through data shows both the data item and a separate screen for the data frequency (Freq). · Input the new value and then press the = key to replace the old value with the new one. This also means that if you want to perform some other operation, you should always press the A key first to exit data display. · Pressing the 7 key instead of = after changing a value on the display registers the value you input as a new data item, and leaves the old value as it is. [. . . ] !c(S-VAR)e b to d Regression Coefficients: A, B, Correlation Coefficient: r Regression Coefficients for Quadratic Regression: A, B, C !c(S-VAR)ee b to d Estimated Values: m, n Estimated Values for Quadratic Regression: m1, m2, n !c(S-VAR)eee b to c (or d) · m, m1, m2 and n are not variables. They are commands of the type that take an argument immediately before them. 1 To calculate the mean (o) and population standard deviation (x ) for the following data: 55, 54, 51, 55, 53, 53, 54, 52 , c(SD) 55 7 54 7 51 7 55 7 53 77 54 7 52 7 fx-82SX PLUS/220 PLUS: !h(o)= 53. 375 !i(x )= 1. 316956719 tanx DEG Same as sinx, except when |x| = (2n­1) × 90. GRA sin­1x cos­1x tan­1x sinhx coshx sinh­1x cosh­1x tanhx tanh­1x logx/lnx 10x 0 0 0 0 1 0 0 0 |x| |x| |x| |x| Same as sinx, except when |x| = (2n­1) × 100. [. . . ]