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

1. Uses math integers,
2. Can include fractions or decimal values,
3. The “+” addition sign between quantities summed,
4. Use “=” (equal to) math sign to separate quantities

summed  from their sum, and

1. Sums (answers) can be zero or positive values.

Three Apples

## Single Digit Addition

1 + 1

=

2

5 + 7

=

12

1 + 9

=

10

6 + 0

=

6

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

## Double Digit Addition

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

34

+ 27

61

Can be written or expressed as:

30

20

50

+

+

+

4

7

11

=

=

=

34

27

61

-or-

4

3034

+

+

+

7

2027

=

=

=

11

50

61

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

Five Oranges

83

7

+ 49

139

Can be written or expressed as:

80

0 40

120

+

+

+

+

3

7

9

19

=

=

=

=

83

7

49

139

-or-

03

80

83

+

+

+

7

0

7

+

+

+

9

40

49

=

=

=

19

120

139

## 3 Digit Addition

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

125

839

+ 362

1,326

Can be written or expressed as:

125 + 839 + 362 = 1,326

100

800

300

1,200

+

+

+

+

20

30

60

110

+

+

+

+

5

9

2

16

=

=

=

=

125

839

362

1,326

-or-

005

020

100

125

+

+

+

+

9

30

800

839

+

+

+

+

2

60

300

392

=

=

=

=

16

110

1,200

1,326

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

Single Digit Addition Worksheet

Double Digit Addition Worksheet

Triple Digit Addition Worksheet

Top of Page