pocket calculator

Small self-powered electronic instrument used to automatically make numerical calculations.

equals key

Key used to display the results of operations carried out.

change sign key

Key used to change the plus or minus sign of the displayed number.

subtract from memory

Key used to erase the displayed number from memory.

add in memory

Key used to save the displayed number in memory.

clear key

Key used to return the pocket calculator to zero.

divide key

Key used to calculate the quotient of two numbers.

clear-entry key

Key used to erase the last number entered.

square root key

Key used to derive the square root of a number; this is the number that is multiplied by itself to give the basic number.

multiply key

Key used to calculate the product of two numbers.

decimal key

Key used to insert a decimal symbol to separate the whole and fraction parts of a number.

subtract key

Key used to calculate the difference between two numbers.

number key

Key used to enter a number.

memory cancel

Button that erases data stored in memory.

memory recall

Button that displays data stored in memory.

display

Liquid crystal display that shows the last number entered or the result of operations carried out.

solar cell

Device that converts sunlight into electric current to power a pocket calculator.

wallet

percent key

Key used to obtain the decimal form of a displayed number by dividing it by 100; it is used mainly to calculate percentages.

add key

Key used to add two numbers.