Datexx DB-413 owner manual Setting the Time, Making Calculations

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.

Operation5

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-

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 =	7
	8 x 3 - 4 =	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

6Operation

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:

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

Press MRC twice to clear the memory.

Press M+ to total a calculation and add the total to the value in memory.

		FUNCTION
CHECKING CARD SAVING TAX			DEP(+) CHK(–) BAL (=)		DAY
	REVIEW				DATE
	ENTRY#
				AL	TIME
				AM

7	8	9	x	÷
M+	5	6	-
4				%
M–	2	3
1			+	TAX
MRC		=		SET
0
				TAX RATE

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

Operation7

Press M- to total a

calculation and subtract the total from the value in memory.

Press MRC to recall (display) the value in memory.

8Operation