unitrex mini handy 80m User manual

DiSTRlBUTED BY
n nr a i umtrexof
l^AK I AMERICA me.
EMPIRE STATE BUILDING .
350 F/FTW A VE. N. Y ., N.Y. 1OO01
Printed in Japan
handy 80M

CONTENTS
PAGE
BASIC OPERATIONS . x
1. Addition. . i
2. Subtraction . 2
3. Multiplication. 2
4. Division *“*’*'*’. 2
5. Decimals . 3
^ Battery Check Function
advanced CALCULATIONS 3
1„ Negative Calculations 4&5
2, Chain Functions “ ^
3 constant Multiplication/Division . y
4 Squaring and Raising to Power- - - '—. ?
5. Add-Mode Calculation .— '. g
6. Memory Calculation - *
COMMERCIAL APPLICATIONS . g
1. Simple Discounts. . g
2 Chain Discounts & Tax Add-ons .
3 Percentage Figures a? a Constant. ^
4 Repeated Addition & Subtraction — " u
5. Payroll Applications. 12
6. Interest Calculations
SPECIAL IRD1CAT0RS . 13
1. Overflow... ].. 13
2. Negative*.
BATTEM . 'ZZZ'. 15
MAINTENANCE INSTRUCTION.

Your UNtTREX SOM has ten numerical entry keys
to set digits from 0 through 9 plus a decimal entry
Hey which allows the operator to set the decimal
point where needed.
Before starting an operation, clear the calculator by
depressing the El Clear Key. A zero (0.) will appear
in the display window
When the operator is aware of having entered an
incorrect number the keyboard entry, can be cleared
of that number by depressing the C Key without
disturbing the previous entries or results.
The Key is for calculating percentages.
BASIC OPERATIONS
1. Addition Example: 123 + 45 = 168
Depress the CD 1213 Keys. As the numbers are
depressed they will appear in the display window
Next, depress the El Key. Now depress the 0 El
Keys and the ffl Key again. The correct total
(168) will appear in the display window
Note: Be sure to clear (© Key) the calculator
before performing die next calculation.
2. Subtraction Example: 678-90- 588
Depress the ©SI] Keys. Depress the EB Key
to enter the numbers into the calculator. Depress
the OB© Keys and depress the B Key to subtract
the numbers from the previous entry. The result
(588) will appear in the display window.
Multiplication Example. 456X 2-912
Depress the SSI® Keys and fcose numbers
appear in the display window. Depress.the □
Key Depress the 55 Key. Depress the B Key
and the answer (.912) will appear in the display
window.
Division Example .789-3=263
Depress the 12®® Keys. Depress the 0 Key.
Depress the ® Key and the 0 Key. The answer
(263) will appear in the display window.
Decimals Example: 65.38X 1 . 4 4 = 94.1472
Set Decimal Switch to left position Depress the
mmomm Keys. Depress the 0 Key. Depress
the IBQEKS Keys. To receive the correct
th* i=l Kev The answer (94. 14
answer depress the LJ y ' T . unjtrEX
72) will appear in the display window. The UNITREX
gOM will automatically float the decimal to .ts
est position when the Decimal S^tch ,s « the
left position.
Now perform the same emulation as above^but
MOVE THE DECIMAL SWITCH TO THE RU3HT
POSITION. You will receive the answer (94.151
in the display window. You will notice this answer
is nearly the same as the above answer except
that the calculator has reduced the ^nswer to
decimal places and rounded the answer off to the
nearest cent This is known as round-off, and s
a very valuable feature when calculating in dollars
and cents.

#BATTERY CHECK FUNCTION
The dry cell (Q06P 9V) should be replaced when a
round lamp at left of the display is lit up.
ADVANCED CALCULATIONS
For the remaining problems follow the calculations in
the sequence as outlined under the KEY column.
Depress the function keys or numerical entry keys
as shown. The results will be shown in the display
as listed in the DISPLAY SHOWS column.
1. Negative Calculations
Example: (—26) + ( —15) = —41
(Decimal Switch at F Position)
DEPRESS KEY DISPLAY SHGWS
:T1
26.
26.
15.
41. Answer
Example: (~ 4 }X 8 =—32
(Decimal Switch at
DEPRESS KEY
F Position)
DISPLAY shows
0.
4.
—4.
-4.
8.
—32. Answer
Example: 32T- ( —4) — — 8
(Decimal Switch at F Position)
DEPRESS KEY
\s
B
2. Chain Functions
Example: { 95 -F 78 + 82 ) ~ 3 -
(Decimal Switch at
DEPRESS KEY
display SHOWS
a
3a
32.
4.
8.
—8. Answer
=85
F Position)
DISPLAY SHOWS
0.
95.
95.
78.
1 73.
82.
2 55.
2 55.
3.
85. Ans
g 85. Answer
Example: 56 X 63 X 89-r 56— 5607
(Decimal Switch at F Position)
DEPRESS KEY DISPLAY SHOWS
® 56.
ISK&i
I® sst .
(Intermediate result)
mi[g - ' 89.
313992.
(Intermediate result)
(51161 ^ 6 .
jd 5607. Answer

Example: (56+ 56—80 ) X 23.9 58.777077
(Decimal Switch at F Position)
DEPRESS KEY DISPLAY SHOWS
El °-
(HE 5&
B 56.
(HE 56 -
B3 !“•
SHU 89 -
S 2a
El 2a
(US 2a
(Intermediate result)
9.
58.777777. Answer
Example: (2-1-5—3)
. (Decimal Switch at F Position)
DEPRESS KEY ®S pLW
DISPLAY SHOWS
0.
■
2 .
2.
5.
7.
3.
4.
4.
8 .
32.
(Intermediate result)
4.
8 .
(Intermediate result)
8 .
7.
1. Answer
Constant Multiplication and Division !
Your UNITREX SOM calculator is equipped with a
automatic constant memory feature
you to MULTIPLY over and over using the same
number without re-entering.
Example: 12X10= 120(A) 12X 36=432(6)
12X52=624(0
(Decimal Switch at F Position)
depress key fflS|,LJ,Y SHBWS
m °-
1213
E 1Z '
mjol
j±! 120. Answer to A
r§lfe1 36.
jgj 432. Answer to B
S® 624. Answer to C
la
Your UNITREX 80M calculator equipped with an
automatic constant memory feature “ J n
you to DIVIDE over and over using the same
number without re-entering.
16^8—2(A)
108-r8= 13.5(C)
96-^8=12(6)
DEPRESS KEY
m®
display shows
0.
16.
16.
a
2. Answer to A
96.
12. Answer to B
108.
13.5 Answer to C

4. Squaring and Raising to Power
Example: 12*
DEPRESS KEY
144
a '
Example: 12*
REPRESS KEY
(Dtcimat Switch at F Position}
DISPLAY SHOWS
0 .
12 .
12 .
144. Answer
1728 (Oicimal Switch at F Position)
DISPLAY SHOWS
0.
emu
12 .
El
12. (1st Power)
©
144. (2nd Power)
a
1728. (3rd Power)Answer
20736
El
5.
Example: 12 4 =20736 (Oicimal Switch at F Position)
DEPRESS KEY DISPLAY SHOWS
m °-
moo 1Z
g 12. (1st Power)
g 144. (2nd Power)
g 1728. (3rd Power)
g 20736. (4th Power)Answer
ADD-MODE CALCULATION
(Decimal Switch at AW Position)
When the decimal point switch is set to S-(AM)
each displayed entry is divided by 100 .
(Example) 5365 ffi.53.65
Nametv, any number is automatically displayed, as a
number divided by 100 , and the decimal point key
need not be depressed. Such a feature is very
useful in the following cases:
1. Calculations regarding dollars and cents
2. Calculations regarding yen and sen
3. Other calculations with a decimal point always
fixed to the second digit.
T
Example: 12 . 55 +3+5.15-8.32= 12.38
El
mmm
e
DISPLAY SHOWS
0
12.55
12.55
3.00
15.55
5,15
20.70
8.32
12.38
5.MEMORY CALCULATION
(Memory Switch at M Position)
(Decimal Switch at^F Position)
The memory is very useful when temporarily storing
an entry in the middle of complicated calculations
such as vertical and horizontal calculations in slips.
Set the memory switch to the ACC(M) side. ©key
and M key are used to put an entry in the memory.
When a number is stored in the memory, the 9th
figure shows a red markingC • )*
COMMERCIAL APPLICATIONS
1. Simple Discounting
(Decimal Switch at 2 Position)
An item sells for $ 53.50 with a discount of 25%.
What is the discount?
What is the NET selling price?
Enter H]@Q0i3
Depress SI
Enter {DH3
Depless M (Read $ 13.38 discount)
Depress E (Read $ 40.12 NET price)

From the above problem you can see how your
UN1TREX SOM unique keyboard memory system works
for computing discounts and then subtracting those
discounts from the previously entered figure without
re-entry. Now see in the example below how this
keyboard memory system works for tax calculations
and add-ons.
2. Chain Discounts and Tax Add-ons
(Decimal Switch at 2 Position)
An item sells for $ 93.50 with a discount of 25%
and sales tax of 5% on the reduced sum.
What is the discount? What is the sales tax?
What is the total selling price?
Enter GBSJE3GS
Depress ®
Enter GO©
Depress HI (Read $23.38 discount)
Depress B (Read $70.12 Sales Price)
Depress ®
Enter 00
Depress dH (Read $3.51 Sales Tax,
Depress S (Read $73.63 Total Selling
Price)
3. Percentage Figure as a Constant
(Decimal Switch at 2 Position)
How much is 17 l A% of $120 and $279.11 and
$ 56.90 ?
Decimal Switch Right
Enter roaDUMH (17 l A)
Depress ®
Enter ffiCUGj]
Depress HU (Read $20.70)
Enter CllElIDQCDQQ
Depress Hil (Read $48.15)
Enter EU1SQ®
Depress Hi] (Read $9.82)

5. Payroll (Hourly Wages) Using Constant
Memory. (Decimal Switch at 2 Position)
Employee A
Employee 8
Employee C
Employee D
DEPRESS KEY
$ Z25/hour for 40 hours =
$ 90.00
$ 2.25/hour for 30 hours —
$ 67.50
k
S 2.25/hour for 25.9 hours =
S 58.28
$ 2.25/hour for 33.3 hours —
$ 74.93
DISPLAY SHOWS
0.2
2.25
2.25
40.
90. Answer to A
30.
• €
67.5 Answer to B
25,9
58.28Answer to C
33.3
74.93Answer to D
6. Interest Calculations
(Decimal Switch at 2 Position)
You have a loan of $ 5,000 for 90 days
interest How much interest will you pay?
5000X 8 X 9 Q_ *
360 * 1 00
at 8%
DEPRESS KEY
13 /
DISPLAY SHOWS
0 .
5000.
5000.
a
400. (interest
for 1 year)
400.
90.
36000.
360.
100. Answer
Example: Find interest charged on a loan for
$ 1,250 for one year at 8% interest What is the
total amount to be paid back ? What are the
monthly payments for 12 months? 1250X8—?+
1250+12
Enter
Depress
Enter
Depress
Depress
$ 112.50
(Read $ 100 interest)
(Read $ 1,350 prtncicipfe and
interest)
Depress
Enter
Depress
El (Read $ 112.50 Monthly
Payments)

SPECIAL. INDICATORS
Your UN IT REX SOM is equipped with indicators for
overflow and for negative answers.
1. Overflow
When multiplying large numbers where the answer
will exceed 8 digits, the calculator will alert you by
giving you the first 8 digits of the answer and
displaying "C or E” to the extreme left of the
display window.
2. Negative Results
When a result is negative the calculator will alert
you by displaying a “ —" (minus) sign to the
extreme left of the display window.
BATTERY
V
Preparation for use.
Battery power.
Open tne cover of the battery compartment on the
bottom of the unit and insert a battery to match the
polailty as per drawing. Close the cover and slide the-
power switch "ON”
Note: Plug out when using battery.
AC power.
UNITREX 8QM can be operated from the home power
by using AC adapter. In case of using AC adapter,
please take care to slide the power switch to the
"OFF” position.

MAINTENANCE INSTRUCTION
This calculator is made up of precision parts such
as LSI. Radical changes in temperature or humidity
can de harmful. The following points must be carefully
noted,
L Do not drop or jar the machine.
2. Always be certain machine is‘switched “OFF” when
not in operation. This will prevent unnecessary
drain on the batteries.
3. Long hours of direct heat rays from the sun or
an appliance must be avoided.
4. When cleaning the machine, use a neutral cleaner.
Do not use a wet doth or liquid such as paint
thinner.
•• . i i yv - * .. • ••••• •*• ••* ■ *