User manual SHARP QS2130

[. . . ] "5/4" position: In multiplication and division, an answer is rounded off. Note: In addition and subtraction or floating decimal mode, an answer is rounded down. Decimal position (F, 3, 2, 0) Presets the number of decimal places in the answer. In the "F" position, the answer is displayed in the floating decimal system. [. . . ] Positive Negative 5. ­ Example: 5 POWER ON/CLEAR KEY: Clears the contents of the calculator, excluding the memory register. key whenever there are no display indicators, meaningless display · Press the figures or signs appear or the keys do not function despite sufficient light. 12 13 14 0 00 to 9 NUMERAL KEYS: Used to enter numbers. DECIMAL POINT KEY: Inputs the decimal place when depressed before or after a numeric entry. Example: 7 0. 7 MINUS EQUALS KEY: Subtracts the number from the contents of the calculation register. This key is also used to obtain the product/quotient in negative multiplication and division. PLUS EQUALS KEY: Adds the number to the contents of the calculation register. This key is also used to obtain the results in multiplication and division. MULTIPLE USE KEY: Used to perform mark-up, percent change and automatic add-on/discount. PERCENT KEY: Permits entry of actual percentages rather than their decimal equivalents for percent calculations. Example: Set decimal at 2 150 25 37. 50 15 16 17 18 6 19 20 21 DIVISION KEY: Orders division. 1ST MEMORY KEYS: These keys have access to the 1st memory register to store, calculate and recall numbers for further use. MEMORY PLUS : When depressed after a numeric key or a calculation this key adds the numbers or the result to the 1st memory register. : When depressed after a numeric key or a calculation this key MEMORY MINUS subtracts the numbers or the result from the 1st memory register. RECALLMEMORY : Displays the contents stored (the answer) in the 1st memory register on the display. It does not clear the contents, but recalls the answer to the display. CLEAR MEMORY : Clears the entire contents of the 1st memory register only. DISPLAY 22 : 1st memory symbol Appears when a number is in the 1st memory. 7 POWER SUPPLY This calculator has a solar cell and is energized by electrical energy produced by the solar cell. The solar cell converts luminous energy directly into electrical energy by utilizing the photovoltaic effect. Brightness for operation If the light exposed to the solar cell is insufficient, the calculator is not powered to operate. With the brightness criterion below, operate the calculator at 150 Iux or more. Outdoors or by the window: Incandescent lamp: Fluorescent lamp: Use the calculator where it is not exposed to direct sunlight but receives enough illumination for comfortable reading. Use the calculator wherever it receives the same illumination as attained within 2. 5 meters of a 100 Watts incandescent lamp. Use the calculator wherever it receives the same illumination as attained within 1. 5 meters of a 15 Watts fluorescent lamp. Backup Battery If the light exposed to the solar cell is insufficient (150 Iux or lower), the backup battery is turned on automatically to operate the calculator. 8 Replacing the Backup Battery The backup battery can support the solar cell for approximately seven years at room temperature (20°C/68°F). [. . . ] 8'150. 00 1'630. 00 AVERAGING Calculate the average of a series of values. EXAMPLE: Day Sales Monday . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . $123. 15 Tuesday . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118. 00 Wednesday . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ]