Contents:

• Addition.
• Subtraction.
• Multiplication.
• Division.

Addition: The sum of two or more numbers. Sign ' + '. Example: 8 + 4 = 12.

Exercise in addition:

Subtraction: The difference of two numbers. Sign ''. Example: 84 = 4.

Exercise in subtraction: (Note; advanced level may give a minus number in the answer.)

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Multiplication: The product of two or more numbers. Sign ' x '. Example: 8 x 4 = 32.

Exercise in multiplication:

Division: The quotient of two numbers. Sign '' or ' / '. Example: 84 = 2.

Exercise in division: (Note; the ' / ' is used for divide by.)

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