Owner's Manual
Please read before using.
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.
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 5-12 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.
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.
Performing Calculations
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 ÷ 7 = 2
[1] [4] [÷] [7] [=]
2
√
64 = 8
[6] [4] [
√
]
8
Calculate 6% of 100
[1] [0] [0] [x] [6] [%]
6
Price = $20, add 8% tax
[2] [0] [+] [8] [%]
21.6
Original cost = $150,
[1][5][0][x][2][0][MU]
180
mark up by 20%
Selling price = $150,
[1][5][0][–][8][0][MU]
87.5
cost = $80
what is the mark up.
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/AC] [8] [x] [6] [=]
48
23 x 45
[2] [3] [x] [4] [5] [=]
1035
=
[GT]
1083
Replacing the Battery
• Remove the screws that hold the back cover in place and remove
the cover and the old battery.
• Wipe the new battery with dry soft cloth and place it into the
calculator with the (+) side facing up.
• Press
[ON/AC]
to turn the power on.
Note: A dead battery can leak and damage the
calculator if left in the battery compartment for long
periods.
DUAL POWER
CALCULATOR
DD-880
