Desk Calculator Manual
— 1 —
 English
Contents
1.  Important Precautions ........................................................ 1
2.  About Calculation Steps ..................................................... 1
3. Finalizing a Calculation ....................................................... 2
4.  Memory Clear Button .......................................................... 2
5.  Power Supply ....................................................................... 2
6.  Specifications ...................................................................... 2
7. Basic Calculations ............................................................. 36
8.  Tax Calculations (MJ-100D, MJ-120D) ............................. 41
9.  Reviewing a Calculation ................................................... 45
10. Numeric Display Format ................................................... 66
• Be sure to keep all user documentation handy for future reference.
1. Important Precautions
• Avoid dropping the calculator and otherwise subjecting it to severe 
impact.
• Never bend or twist the case.
• Never try to take the calculator apart.
• Wipe the unit with a soft, dry cloth to clean it.
• The contents of these instructions are subject to change without 
notice.
• CASIO COMPUTER CO., LTD. assumes no responsibility for any 
loss or claims by third parties which may arise from the use of this 
product.
2. About Calculation Steps
• The step indicator shows the number of the step currently shown on 
the display.
• A finalize key operation and the result it produces is also a step. See 
“Finalizing a Calculation” below.










