constants， not the keypad or page controls. FractionsFraction Bar / Use / between the numerator and denominator. Fraction Space ␣ Use ␣ between a whole number and its fraction. DEC / FRA DEC shows decimal results. FRA shows fraction results. You can switch modes after a calculation. Mixed / Improper Mixed-fraction mode uses compact notation such as 1 4/5 . Improper-fraction mode shows the same value as 9/5 . Examples 3 / 4 = 3/4 5 ␣ 3 / 4 = 5 3/4 1/2 with FRA selected shows 1/2 . 1/2 with DEC selected shows 0.5 . 9/5 with mixed-fraction mode 1 4/5 selected shows 1 4/5 . 1 4/5 with improper-fraction mode 9/5 selected shows 9/5 . ， - ， Help and TipsColor Coding Blue: numbers， the decimal point， * ， and footnote before printing the tape. Only the prepared tape document is printed。

and / keys enter arithmetic operations. Tape and Tape Buttons Calculations are saved on the tape. Select an earlier number or operator to edit it， such as addition and division. Rosy: functions involving one number， description， and memory recall. Orange: operations involving two numbers， fractions， then use = to recalculate the tape and update the result. Clearing Buttons removes the last digit from the current entry. C clears the current entry. AC clears the calculator and tape and resets active functions. MC clears memory. Memory Buttons MR recalls the stored value into the current entry. M+ adds the current value to memory. M- subtracts the current value from memory. MC resets memory to zero. Function Buttons % applies a percentage calculation. √ calculates the square root of the current value. Printing opens a dialog where you can add a title， such as Print. Gray: formatting controls， plus/minus sign， such as percent and square root. Red: clear and delete actions. Green: the result or equals action. Black: calculator and tape actions， and scientific notation. Keyboard Use the numeric keypad to enter numbers. The keyboard Enter key performs the same result action as = . Use to remove the last digit and Delete to clear the current entry. The + ，。

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