Sharp QS-2130 - Manual (Page 7)

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11 CHANGE SIGN KEY:
Changes the sign of a number from a positive to a negative or a negative to a positive.
Positive Negative
Example: 5
→
5.–
12 POWER ON/CLEAR KEY:
Clears the contents of the calculator, excluding the memory register.
•
Press the key whenever there are no display indicators, meaningless display
figures or signs appear or the keys do not function despite sufficient light.
13
0 00 to 9 NUMERAL KEYS:
Used to enter numbers.
14 DECIMAL POINT KEY:
Inputs the decimal place when depressed before or after a numeric entry.
Example:
7
→
0.7
15
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.
16 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.
17 MULTIPLE USE KEY:
Used to perform mark-up, percent change and automatic add-on/discount.
18
PERCENT KEY:
Permits entry of actual percentages rather than their decimal equivalents for percent
calculations.
Example:
Set decimal at 2
150
25
→
37.50