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User manual Casio, model 250HC

Manafacture: Casio
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A z Power .................................................... A w Random number ................................... A c Reciprocal ............................................. A X Rectangular-to-polar ............................. A y Root ...................................................... A s Sine ....................................................... S — 20 — Square .................................................. A K Square root ........................................... L Tangent ................................................. h Permutation ........................................... A m Combination .......................................... A n • Statistics (SD Mode) Arithmetic mean .................................... A ` Data delete ............................................ A [ Data input .............................................. } Number of data ..................................... A r Population standard deviation ............... A p Sample standard deviation ................... A q Statistical register clear ......................... A u Sum of squares of values ..................... A a Sum of values ....................................... A o kExponential Display Formats This calculator can display up to 10 digits. Larger values are automatically displayed using exponential notation. In the case of decimal value, you can select between two formats that determine at what point exponential notation is used. — 21 — • NORM 1 With NORM 1, exponential notation is automatically used for integer values with more than 10 digits and decimal values with more than two decimal places. • NORM 2 With NORM 2, exponential notation is automatically used for integer values with more than 10 digits and decimal values with more than nine decimal places. To switch between NORM 1 and NORM 2 Press F9. There is no indication on the display of which format is currently in effect, but you can determine the setting by performing the following calculation. 1 \ 200 = 5. –03 NORM 1 format 0.005 NORM 2 format • All of the examples in this manual show calculation results using the NORM 1 format. kWhen you have a problem... If calculation results are not what you expect or if an error occurs, perform the following steps. 1. F0 (COMP mode) 2. F4 (DEG mode) 3. F9 (NORM mode) 4. Check the formula you are working with to confirm it is correct. 5. Enter the correct modes to perform the calculation and try again. — 22 — kMaking Corrections During Calculations • If you make a mistake when inputting a value (but did not yet press an arithmetic operator key), press kto clear the value and then input the correct one. • In a series of calculations, press kwhile an intermediate result is displayed to clear only the last calculation performed. •To change the operator key ( +, ,, -, \, Aw, As, etc.) you just pressed, simply press the correct operator key. In this case, the operator of the last key you press is used, but the o...