Calculator Help
[Release 10]
Number Entry
The number keys [0] to [9] and decimal point key are used to enter numbers. To enter a negative number, press [+/-] after entering the number.
The [DEL] key deletes the last digit entered and can be used to correct a number or exponent.
The [C] key clears the display ready for a new calculation.
Exponents
To enter a number with an exponent, press [EXP] then enter the exponent using the number keys and the [+/-] key.
Memory
The memory has three function keys.
[MS] stores the current display value.
[MR] recalls the value stored in memory to the display.
[M+] adds the current display value to the memory.
The colour of [MS] changes to indicate that memory has a stored value and reverts to the original colour when [MS] value is cleared to zero.
Arithmetic Calculations
Arithmetic calculations are as shown below:
Key strokes Display
[7][+][9][=] ==> [ 16]
[9][-][3][=] ==> [ 6]
[7][*][9][=] ==> [ 63]
[9][/][6][=] ==> [ 1.5]
Days Function
NOTE:
The [Days] key is initially hidden from but replaces the [X2] when there is a valid input for the Days function.
Days Function has two modes.
(i) Calculates the date from a start date and N days.
(ii) Calculates the number of days between two dates.
Dates are entered in a six digit format, ddMMyy without separators.
IE: 23 August 2020 is entered as 230820
If 0 is used as a date, today’s date will be used.
Example 1 Calculate the date 33 days from today.
Assume the current date to be 23 Aug 20.
With “0” on the display, press the [+] key, the [Days] key appears in place of the [X2] key.
Enter “33” and press the [Days] key. The date “Fri 25 Sep. 2020” is displayed.
Example 2 Calculate the date 90 days from 4 Oct 2019.
Enter “041019”, press the [+] key, the [Days] key appears in place of the [X2] key.
Enter “90” and press the [Days] key. The date “Thu 2 Jan. 2020” is displayed.
Example 3 Calculate the number of days between today and 25 Dec 2020
Assume the current date to be 23 Aug 20.
With “0” on the display, press the [-] key, the [Days] key appears in place of the [X2] key.
Enter “251220” and press the [Days] key. “124 Days” is displayed.
Percentage Calculations
Percentage calculations are as shown below:
Key strokes Display
[7][+][5][%] ==> [ 7.35] Adds 5% to the display value
[9][-][10][%] ==> [ 8.1] Reduces display value by 10%
[20][*][15][%] ==> [ 3] Returns 15% of value to the display
[8][/][16][%] ==> [ 50] Returns the value of the division as a percentage
Functions
Key strokes Display
[9][^/] ==> [ 3] Returns the sqrt. of value to the display
[9][X2] ==> [ 81] Returns the value squared of value to the display
[8][1/x] ==> [ 0.125] Returns the reciprocal of value to the display
Random Numbers
The RND key generates random numbers in two modes
With value 0 displayed the RND generates a random decimal between 0 and 1 inclusive.
Display Display
[ 0] [RND] ==> [ 0.14327]
With an integer [N] displayed, the RND generates a random integer between 0 and [N] inclusive.
Display Display
[ 100] [RND] ==> [ 27]
In both cases if the original value is not an integer it will be rounded to the closest integer before the random number is generated.
Key Controls
The following are toggled between active and inactive by a “Long Press” on the associated key.
TALK Voice announcement of key pressed
CLICK Click sound when a key pressed
GREET Enables voice greeting when the calculator is first initialised
SCREEN Screen stays alive while calculator is active
VIB Phone vibrates when a key pressed
Name Label
Name is editable by tapping on the area and using the soft keyboard.
Exit edit mode with the keyboard “Return” key.
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