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# Adding Numbers

Math addition is the application of established properties, rules and methods to sum numeric quantities. Simple addition only considers positive whole numbers.

## Properties of Addition

- Uses math integers,
- Can include fractions or decimal values,
- The “+” addition sign between quantities summed,
- Use “=” (equal to) math sign to separate quantities summed from their sum, and
- Sums (answers) can be zero or positive values.

## Double Digit Addition

2 digit addition when one or more numbers is 2 digits.

Can be written or expressed as:

By adding two double digit numbers the largest value that can be obtained is 198, the sum of 99 and 99.

Can be written or expressed as:

## 3 Digit Addition

Triple digit addition when one or more numbers is 3 digits.

Can be written or expressed as:

By adding two triple digit numbers the largest value that can be obtained is 1998, the sum of 999 and 999.

## Single Digit Addition

By adding two single digit numbers the largest value that can be obtained is 18, the sum of 9 and 9.

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