Definitions

number

48px number
A number is a concept from mathematics, used to count or measure. People use symbols to represent numbers; they call them numerals. Common places where numerals are used are for labeling, as in telephone numbers. This extract is licensed under the Creative Commons Attribution-ShareAlike license. It uses material from the article "Number", retrieved 20 03 12.

addition

48px addition
In arithmetic, addition is finding the total of two or more numbers. The sign for addition is "+". The name for the sign "+" is "plus". This extract is licensed under the Creative Commons Attribution-ShareAlike license. It uses material from the article "addition", retrieved 20 03 12.

subtraction

48px subtraction
Subtraction is the arithmetic operation for finding the difference between two numbers. The expression 7 − 4 = 3 can be spoken as "seven minus four equals three," "seven take away four leaves three." The sign for subtraction is "−". The name for the sign "−" is "minus". This extract is licensed under the Creative Commons Attribution-ShareAlike license. It uses material from the article "subtraction", retrieved 20 03 12.

keyboard

48px keyboard
A computer keyboard is an important device that allows a person to enter symbols like letters and numbers into a computer. It is the main input device for most computers. This extract is licensed under the Creative Commons Attribution-ShareAlike license. It uses material from the article "Keyboard_(Computer)", retrieved 20 03 12.

enter key

enter key

A common symbol for the enter key It is usually found near the middle of the right hand side of the keyboard.

click

click

Navigate the cursor over the object you wish to click. Tap or press the (left) mouse button or the (left) button on a track pad. Release the button.