Datexx DB-413 Calculator User Manual


 
SETTING THE TIME
1. Hold down the CLOCK SET (%) about 3 seconds,
until the first digit of the month flashes.
2. Press + to select 12-or 24 hour format. AM or PM
appears to the left of the time to indicate 12-hour
format. Press to toggle between AM or PM in
12- hour format.
3. Enter the correct month, date, year, and time,
then press =.
Notes:
Repeatedly press or to move the cursor for-
ward or backward.
Enter the last two digits of the year. The year
affects the day of the week.
MAKING CALCULATIONS
Note: This Calculator follows standard and simple
mathematical rules.
Operation 5
Standard Calculations
Press the keys in the order they appear in the arith-
metic operation.
Note: To enter a negative number, press then the
number. Or, enter the number and press then =,
MINUS appears on the left side of the display.
You Press
You See
3 + 4 =
8 x 3 - 4 =
7
20
Percentage Calculations
To find a percentage of a number, type the number,
then x, the percentage, and %.
For example, to find the percent of 12:
You Press
You See
12 x 3 % 0.36
6 Operation
Errors
Your calculator displays ERROR if you:
Try to divide by 0
Perform a calculation that result in an answer
greater than 99,999,999
Note: You can determine the approximate
answer by counting the number of digits dis-
played to the left of the decimal point. Put that
many zeros on the right side of the number, then
delete the decimal point. For example, if the cal-
culator displays ERROR 3423.8381, the
approximate answer is 342,383,810,000.
To clear the error and continue the calculation with
the display number, press CE. To clear the entire
calculation and begin again, press ON/AC.
Constant Calculations
Press = to repeat the last function. For example, to
calculate 5 x 5 x 5 x 5 2 2 = 629:
You Press
You See
5 x === +2== 629
Operation 7
Note: For multiplication, the calculator repeats the
first number and the x, For all other operations, the
calculator repeats the operator and the second num-
ber. For example, in the calculation 5 x 7, 5 x is the
constant. In the calculation 12 6, 6 is the constant.
Memory Calculations
To perform multi-step calculations:
Press MRC twice to
clear the memory.
Press M+ to total a
calculation and add
the total to the
value in memory.
Press M- to total a
calculation and subtract the total from the value
in memory.
Press MRC to recall (display) the value in memory.
8 Operation
AL
AM
FUNCTION
REVIEW
ENTRY#
DAY
DATE
TIME
2
0
1
3
5
6
7 8
9
4
=
-
x
÷
+
TAX
%
TAX RATE
SET
M+
M
MRC
CHECKING
CARD
SAVING
TAX DEP(+) CHK(–) BAL (=)