# Datexx DD-980 User Manual

## Dual power calculator dd-980, Owner's manual

Owner's Manual

Features

Dual Solar/Battery Power – built-in solar panel extends battery

life by powering the calculator in the light.

Four Function Memory – includes addition, subtraction, recall,

and clear.

+/– – Press to change the displayed number from positive (+) to

negative (–) and vice versa. "–" appears when the number is

negative.

MU – Mark up calculation.

GT – GT (Grand Total) lets you perform cash register calculations

simply and quickly. Every time you press [=], the displayed

number is memorized and "GT" appears. Press [GT] to display

the sum of all memorized numbers.

EX (Exchange key) –

Exchange two operands between the

operator. For example key in [2][–][8] and then press "EX" will

change to [8][–][2], and you will get the answer of 6.

IC – item counter.

To shift a displayed value digit by digit to the right, until you

get to the digit you want to re-input from.

Automatic Power Off – saves battery power by turning off the

calculator if it is left unused for about 8 minutes.

Memory Functions

[M+]

Press to add the displayed number to memory, "M"

is

displayed.

[M–]

Press to subtract the currently displayed number from

memory.

[MRC] Press once to recall the number in memory. Press

twice to clear the memory.

Setting the Tax Rate

• Input the tax rate (e.g. the tax rate is 8%, then input "8"), press

"TAX RATE" and then "TAX+", the rate is set.

• To check the tax rate stored in the tax memory, press "TAX

RATE" then "TAX–", the rate will be shown on the display.

Performing Calculaations
Example

Key Operation

Display

6 + 7 = 13

[6] [+] [7] [=]

13

10 – 4 = 6

[1] [0] [–] [4] [=]

6

7 x 5 = 35

[7] [x] [5] [=]

35

14 ч 7 = 2

[1] [4] [ч] [7] [=]

2

64 = 8

[6] [4] []

8

Calculate 6% of 100

[1] [0] [0] [x] [6] [%]

6

Calculate a 20%

[1][5][0][x][2][0][MU]

180

discount from \$150.

Selling price

[1][5][0][–][8][0][MU]

87.5

= \$150, cost

= \$80, what is

the mark up

Original cost

[1] [5] [0] [TAX+]

162

= \$150

[TAX+]

12

calculate price-plus-tax

and the tax amount

Price including

[1] [6] [2] [TAX–]

150

tax = 162,

[TAX–]

12

calculate price-less-tax

and the tax amount)

80 x 9 = 720

[8] [0] [x] [9] [M+]

720

–) 50 x 6 = 300

[5] [0] [x] [6] [M–]

300

+) 20 x 3 = 60

[2] [0] [x] [3] [M+]

60

=)

480

[MRC]

480

8 x 6

[ON/C.CE] [GT] [GT]

23 x 45

[8] [x] [6] [=]

48

=

[2] [3] [x] [4] [5] [=]

1035

[GT]

1083

Power Supply

The dual power system of this calculator uses a solar cell, in
addition to one “AA” size battery. To replace the battery, simply
slide the battery cover in the direction of the arrow and then replace
the battery. Note that a dead battery can leak and damage the
calculator if left in the battery compartment for long periods.

Care

• Avoid dropping the calculator and otherwise subjecting it to

severe impact.

• Never bend or twist the calculator.

• Never try to take the calculator apart.

• Wipe the calculator with a soft, dry cloth to clean it.

DUAL POWER

CALCULATOR

DD-980