Casio MJ-100D Plus calculator is a practical desktop calculator designed for everyday business, shop, office and financial calculations. With its 10-digit display, tax calculation function and 300-step checking capability, it provides more functionality than a basic calculator.
The MJ-100D Plus belongs to Casio’s Check Calculator range and is designed to make reviewing calculations easier. It can review up to 300 calculation steps, while its Auto Review function allows the user to review a calculation with a single button. Casio also provides a recheck function with sound assistance to help identify an incorrect key entry during calculation checking.
Its extra-large display makes numbers easier to see, while the three-digit comma markers help separate large numbers for easier reading. The calculator also supports localized number display formats.
Casio MJ-100D Plus Calculator Specifications
| Specification | Details |
|---|---|
| Brand | Casio |
| Model | MJ-100D Plus |
| Calculator Type | Mini Desk / Check Calculator |
| Display | Extra Large LCD |
| Number of Digits | 10 digits |
| Calculation Check | 300 steps |
| Tax Calculation | Yes |
| Recheck Function | Sound Assist |
| Memory | Grand Total (GT) + Independent Memory |
| Mark-Up | Yes |
| Power | Solar + Battery |
| Key Rollover | Yes |
| Number Display | Localized number display |
| Dimensions | 148 × 126.5 × 28.6 mm |
| Weight | 140 g |
These specifications are based on Casio’s official MJ-100D Plus product information.
300-Step Check Calculator
One of the most useful features of the Casio MJ-100D Plus calculator is its 300-step checking function.
The calculator can review up to 300 calculation steps, allowing you to go back through a calculation and check the entries that were made.
This can be especially useful when performing a long series of calculations. Instead of having to repeat the entire calculation from the beginning, you can review the previous calculation steps and identify where an incorrect number or operation may have been entered.
The Auto Review function also allows a calculation to be reviewed with a single button, while Casio states that values and operators can be changed during review and the calculation re-executed to obtain a new result.
Tax Calculation Function
The Casio MJ-100D Plus calculator includes a dedicated tax calculation function, making it particularly useful for business and retail environments.
Casio specifies that its tax calculation functionality can be used for calculations involving price plus tax, price less tax, discounts, selling price, tax amount, discount amount and margin amount.
This makes the calculator useful for shopkeepers, sales staff, business owners and office users who regularly need to calculate prices involving tax.
For example, when working out the selling price of an item after applying a tax rate, the dedicated tax function can make the calculation process more convenient than manually performing each calculation.
Extra-Large Display
The calculator features an extra-large LCD display designed to make displayed numbers easier to read.
The display also includes function command signs, which indicate the operation currently being performed, and three-digit comma markers that make larger numbers easier to interpret.
This can be useful in environments such as shops and offices where calculations may involve relatively large figures.
Recheck with Sound Assist
Another useful feature is Recheck with Sound Assist.
Casio explains that the recheck function can confirm errors by sound when checking calculations. If an incorrect key is pressed while performing a second calculation to check the result, the calculator provides an audible alert.
This provides an additional way to catch key-entry mistakes during calculation checking.
For business users who regularly enter multiple figures, this checking function can provide extra convenience when verifying calculations.
Solar and Battery Power
The Casio MJ-100D Plus calculator uses solar and battery power.
Casio specifies a dual-power system, allowing the calculator to use solar power when sufficient light is available and battery power when necessary.
This makes it practical for everyday office, shop and home use. Options
Mark-Up Function
The calculator includes a mark-up function, which is useful for calculations involving costs, selling prices and margins.
For shopkeepers and business users, mark-up calculations can help when working out prices and margins without having to perform every step manually.
This makes the MJ-100D Plus particularly relevant to retail and business environments where pricing calculations are performed frequently.
Grand Total and Independent Memory
The calculator includes Grand Total (GT) and Independent Memory functions.
Grand Total can be useful when adding together results from different calculations, while independent memory provides a separate way to store numerical values during calculations.
These functions are practical for office and business calculations where several figures may need to be retained or combined.
Localized Number Display
The MJ-100D Plus also includes localized number display, allowing users to switch between different digit-separator formats. Casio describes this as one-touch switching between number separator formats.
This can make large figures easier to read depending on the user’s preferred number format.
Casio MJ-100D Plus Calculator for Shops
The Casio MJ-100D Plus calculator is particularly suitable for shopkeepers and retail businesses.
Its tax calculation function can assist with tax-related price calculations, while the mark-up function can be useful when working with selling prices and margins.
The large display makes figures easier to read across a shop counter or desk, while the 300-step checking function provides a useful way to review longer calculations.
For businesses that regularly calculate prices, totals, discounts and tax amounts, these features make the MJ-100D Plus a practical desktop calculator.
Casio MJ-100D Plus Calculator for Offices
Office users can also benefit from the calculator’s combination of checking, memory and calculation functions.
The 10-digit display provides space for everyday numerical calculations, while Grand Total and independent memory functions can help when working with multiple figures.
The 300-step review capability is especially useful for checking longer calculations and correcting entries without necessarily starting again from the beginning.
Who Is the Casio MJ-100D Plus Suitable For?
Shopkeepers
The tax and mark-up functions make it useful for retail price calculations.
Business Owners
Useful for calculating prices, totals, margins, discounts and tax-related figures.
Office Staff
The large display, memory functions and calculation checking features make it practical for office work.
Accountants and Bookkeeping Users
The 300-step checking function can be useful when reviewing sequences of calculations.
Students and Home Users
It can also handle everyday arithmetic, percentages and other basic calculations at home or during study.
Benefits of the Casio MJ-100D Plus Calculator
The Casio MJ-100D Plus calculator offers a combination of practical business and everyday calculation features:
- 10-digit display
- 300-step calculation checking
- Auto Review
- Sound-assisted rechecking
- Tax calculation
- Mark-up function
- Extra-large display
- Grand Total memory
- Independent memory
- Solar and battery power
- Localized number display
- Key rollover
- Durable UV-coated keys
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