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: |
14
15
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.
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
18
6
MULTIPLE USE KEY:
Used to perform
PERCENT KEY:
Permits entry of actual percentages rather than their decimal equivalents for percent calculations.
Example: Set decimal at 2
150 
25 
→ 37.50