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# Basic Arithmetic

Module by: ProgressiveQuest. E-mail the author

## About - Numbers

• Components
• Digit
• Place-value
• Sequence of digits.
• Quantity or Count of something.
• How much? How many?

## About - Operation

• Components
• Operation: 2 + 3
• Operator: + (plus)
• Operands: 2 and 3
• Properties
• Commutative: a $b = b$ a
• Associative: (a $b)$ c = a $(b$ c)

• Summation
• Totalling
• Counting
• Properties
• Commutative: a + b = b + a
• Associative: (a + b) + c = a + (b + c)

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