User manual COMPAQ 9S

[. . . ] Operations inside parentheses are always executed first. You can specify up to 15 levels of parentheses in a single calculation. When you enter the first parenthesis, the ( ) indicator appears on the display and remains until each opening parenthesis has a corresponding closing parenthesis. [ + ] 4 [ENTER] Note: It is not necessary to press [ ) ] before [ENTER]. [. . . ] Fixed point format The fixed point, scientific, and engineering formats use a fixed number of decimal places to display numbers. If more than the specified number of decimal places is keyed, the entry will be rounded to the correct number of decimal places. 1: Fix the display at 2 decimal places, then key in 3. You can add, subtract, multiply, and divide binary, octal, and hexadecimal numbers in addition to decimal numbers. Select the number base you want by pressing [BIN], [OCT], [HEX], or [DEC]. The BIN, OCT, and HEX indicators show you which base you are using. (If none of these indicators is displayed, you are using decimal base. ) The number keys that are active in a particular base are: Binary base: [ 0 ] and [ 1 ] Octal base: [ 0 ] to [ 7 ] Decimal base: [ 0 ] to [ 9 ] Hexadecimal base: [ 0 ] to [ 9 ] and [ A ] to [ F ] 31 (base 10) = ?If fewer than the set number of decimal places is keyed, the entry will be padded with trailing zeros. 2: Fix the display at 4 decimal places, then key in 4. You can convert an entry to scientific notation by pressing [EXP] after entering the mantissa. 82296 [ EXP ] 5 Engineering format Engineering format is similar to scientific format, except that the mantissa can have up to three digits to the left of the decimal and the exponent is always a multiple of three. This is useful if you have to 3 convert units that are based on multiples of 10 . Where n is an integer other than 0 1 but ­1 x 10100 < log y 100 x InputThe integer, numerator, denominator and fraction symbols must in total be no more than 10 digits. ResultDisplayed as a fraction when the integer, numerator and denominator are each less than 1 × 1010. Note : The display is truncated if the integer, numerator, denominator and fraction symbols together are more than 10 digits. You do this by pressing [+/­] in a non-decimal base. Press [ CPLX ] to enter complex number mode. Complex numbers are generally represented as a + b i, where a is the real part and bi is the imaginary part. If you press [ a b/c ] after pressing [ENTER], or if a fraction was combined with a decimal number, the answer is displayed as a decimal number. Where possible, a fraction is reduced to its lowest terms after you press [ + ], [ ­ ], [ × ], [ ÷ Each calculation is performed in the following order of precedence: 1. Functions that require pressing the function key before entering a value, for example, [ DATA ] in statistics mode, and [ EXP ]. [. . . ] Press 7 [ 2ndF ] [ DEL ] Press any key to clear the message. Press 5 [ × ] 5 [ 2ndF ] [ DEL ] Press any key to clear the message. Instead of entering each data item individually, you can enter the value and the number of occurrences of that value (up to 255). 9 can be entered as follows: Alternative method [ DATA ] 2 [ DATA ] 5 [ × ] 4 [ DATA ] 9 [ × ] 3 where item 1 = 2, items 2 to 5 = 5, and items 6 to 8 = 9. [. . . ]