Simple number or constant.

Action that involves two numbers (i.e. 6+2).

Action that requires one number (i.e. 40%).

Clears something.

Gives a result.

Actions about the calculator or the tape.

Number formating actions fractions and scientific notation.

You can use your numeric keypad to insert numbers along with the keys 'enter', 'equals', 'backspace', 'delete', as well as the + - * / keys.

All calculations are saved on the tape. Click on any number or operator on the tape and change it at any time. Hit equals and the new result will appear.

You can use the print button to print out the tape.

Clear button clears the last input.

All clear button clears the calculator, tape, and resets any functions.

Memory clear button clears the memory.

Memory recall button retrieves the number you have in memory and places it in the display field.

Memory plus button adds the number displayed to the contents of the memory.

Memory minus button subtracts the number displayed from the contents of the memory.

Percent button is used to find the percentage of a number. Enter the percentage amount, click the % button, then enter the number you want the percentage of, and then click equals. i.e. 20% 125 = 25 where 25 is 20% of 125. Note: The percent function will also work if you enter the number first and then the percentage you want i.e. 125 %20 = 25.

To enter a fraction of the form 3/4. Click a number and then click fraction bar, then click another number.

You can use fraction space button to create a number of the form 5 3/4. Enter a number, then click fraction space, click another number and then click on the fraction bar button, lastly enter another number.

Decimal format button and Fraction format button work as pair. When you choose the one the other is switched off.

Decimal format button is used for all decimal work. Also to change a fraction of the form 3/4 to the decimal 0.75, or a fraction of the form 7/4 or a mixed number of the form 1 3/4 to the decimal 1.75. Click on the decimal format button, enter a fraction or mixed number, then click equals. If the fraction or mixed number is only part of the calculation then omit clicking equals and continue with the calculation per usual. i.e. 3/4 DEC x 6 =.

Fraction format button is used to work with all fractions. Also to change a decimal of the form 0.5 to the fraction 1/2, or change a decimal of the form 1.75 to a mixed number of the form 1 3/4 or to the fraction 7/4, or a fraction of the form 7/4 to the mixed number 1 3/4. Click the fraction format button, enter a decimal, click equals and then click on a fraction form and then click equals. If the fraction of decimal is part of a calculation, omit clicking equals and continue with the calculation.

Proper fraction button and Improper fraction button work as pair. When you choose the one the other is switched off.

Proper fraction button is used to change a number of the form of 9/5 to the form of 1 4/5. A proper fraction is a fraction where the numerator (top number) is less than the denominator (bottom number).

Improper fraction button is used to change a number of the form of 1 4/5 to the form of 9/5. An improper fraction is a fraction where the numerator (top number is greater than or equal to the denominator (bottom number).