Datexx SK-900 Operation & User’s Manual

The SK-900 Color pencil case with calculator makes getting organized easy and fun. Open the case and there’s
a place for all your school stuff. The big number keys are colorful and fun to use while the extra-large LCD dis-
play and the two-way solar/battery power supply let you use it anywhere.  
• Dual power – Solar/Battery • Colorful case with big number keys
• Secure compartment for supplies • Extra large 8-Digit LCD display
TURNING ON THE CALCULATOR
Press ON/C to turn on the power. It will automatically turn off after about 5 minutes if no key is pressed. Press
OFF to turn it off sooner. If the calculator is on, Pressing ON/C  twice resets the display and memory to 0.
USING THE CALCULATOR
+/– Key – Press to change the displayed number from positive (+) to negative (–) or from negative (–) to posi-
tive (+).  – appears when the number is negative.
CE Key – Press CE to clear the display. If a result is too big to be displayed, the calculator stops and shows E.
Press CE to continue calculating.
USING THE MEMORY
SK-900
Pencil Box Calculator
M +
Press to add the displayed
number into memory.
MEMORY appears in the 
display.
Press to subtract the
currently displayed
number from memory.
Press once to display the number
stored in memory. Press twice to
clear the memory. MEMORY dis-
appears from the display.
Addition (+)  6 + 7 = 13
6 + 7 = 
Subtraction (–)  10 – 4 = 6
1 0 – 4 = 
Multiplication (x)  7 x 5 = 35
7 x 5 = 
Division (÷)  14 ÷ 7 = 2
1 4 ÷ 7 =
Square Root ( √ )  Find the square root of 64.
6 4  √
Percentages (%) 
Find 6% of 100.
1 0 0 x 6 %
Add 6% tax to $20.
2 0 + 6 %
20% discount from $150.
1 5 0 – 2 0 %
What percent of 250 is 50?
5 0 ÷ 2 5 0 %
REPLACING THE BATTERY
1.  Remove the top and turn it upside down.
2. Remove the screws on the rear cover and remove
the rear cover.
3.  Remove the old battery and insert
the new battery with the – side up.
Replace the rear cover and screws.
Return the top to the case.
CARE AND MAINTENANCE
• Keep the calculator dry. If it gets wet, dry  it before
using the calculator.
• Keep the calculator in moderate temperatures.
• Do not drop or strike the calculator.
• Clean the case with a soft damp cloth. Do not use
harsh chemicals to clean it.
Do not tamper with the internal components.  If the
calculator does not work properly, return it to Datexx
for service.
TELEDEX Limited U.S.A. Warranty
TELEDEX INC. warrants these products to the original purchaser to be free from defective material and workmanship. Under this warranty, the product will be
repaired or replaced at our option, for up to one year, without charge except for supplies or accessories such as batteries, wallets etc, when returned with proof of
purchase to TELEDEX SERVICECENTER, 1 ATLAS St. Kenilworth NJ 07033. A check or money order for $5.00 to cover postage must be included. This is the
exclusive written warranty. No other warranty, expressed or implied, shall extend beyond the time listed above. TELEDEX is not liable for consequential economic
or property damage. Some states do not allow a time limit on implied warranties or exclusion of consequential damage so this may not apply to you. This warranty
gives you specific legal rights. You may have other legal rights that vary from state to state.
Warranty valid only in the U.S.A. TELEDEX INC. 1 Atlas st. Kenilworth, NJ 07033 Printed in China  
M –
M R C

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