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

- 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.

Three Apples

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.

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

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.

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