Permutation (nPr), combination (nCr)
Multiplication (×), division (÷)
10 Addition (+), subtraction (−)
Note: When squaring a negative value (such as -2), the value being
squared must be enclosed in parentheses (2). Since x
a higher priority than the negative sign, inputting 2 would result in
the squaring of 2 and then appending a negative sign to the result. Always
keep the priority sequence in mind, and enclose negative values in
parentheses when required.
Inputting an Expression Using Natural Textbook
Format (MathI/MathO or MathI/DecimalO Only)
Formulas and expressions that include fractions and/or special functions
such as √ can be input in natural textbook format by using templates that
appear when certain keys are pressed.
1. Press ().
• This inputs a mixed fraction template.
2. Input values into the integer, numerator, and denominator areas of the
3. Do the same to input the remainder of the expression.
Tip: While the input cursor is located within the input area of a template
(mixed fractions), pressing jumps to the position immediately
following (to the right) of the template, while pressing jumps to the
position immediate before (to the left of) it.
• When you press and obtain a calculation result, part of the
expression you input may be cut off. If you need to view the entire input
expression again, press and then use and to scroll the input
• Nesting of functions and parentheses is allowed. Further input will
become impossible if you nest too many functions and/or parentheses.
To undo operations (MathI/MathO or MathI/DecimalO only): To undo the
last key operation, press (UNDO). To redo a key operation you have
just undone, press (UNDO) again.
Using Values and Expressions as Arguments (MathI/
MathO or MathI/DecimalO only)
Example: To input 1 +
and then change it to 1 +