User manual - fx-9860GII_Soft

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I Using Undoing and Redoing Operations

You can use the following procedures during calculation expression input in the Math input/

output mode (up until you press the U key) to undo the last key operation and to redo the

key operation you have just undone.

- To undo the last key operation, press: ?#(UNDO).

- To redo a key operation you have just undone, press: ?#(UNDO) again.

• You also can use UNDO to cancel an key operation. After pressing to clear an

expression you have input, pressing ?#(UNDO) will restore what was on the display

before you pressed .

• You also can use UNDO to cancel a cursor key operation. If you press C during input and

then press ?#(UNDO), the cursor will return to where it was before you pressed C.

• The UNDO operation is disabled while the keyboard is alpha-locked. Pressing

?#(UNDO) while the keyboard is alpha-locked will perform the same delete operation

as the # key alone.

Example

@6@C

?#(UNDO)

I Math Input/Output Mode Calculation Result Display

Fractions, matrices, and lists produced by Math input/output mode calculations are displayed

in natural format, just as they appear in your textbook.

Sample Calculation Result Displays

• Fractions are displayed either as improper fractions or mixed fractions, depending on the

“Frac Result” setting on the Setup screen. For details, see “Using the Setup Screen” (page

1-26).