ADDITION TABLES 1 TO 20

Adding One-Digit Number and One-Digit Number

It is easier to add one digit number and one digit number, when the result is less than 10.

Examples :

1 + 2 = 3

3 + 4 = 7

5 + 4 = 9

6 + 2 = 8

How to add one digit number and one digit number, when the result is greater than 10?

Consider the following addition

7 + 5

Here, 7 is close to the round figure 10. To make 7 as 10, we have to add 3 to 7. Take 3 from 5 and add it to 7 and do the rest of the process.

= 7 + 5

= 7 + 3 + 2

= 10 + 2

= 12

Adding One-Digit Number and Two- Digit Number

Write the given two digit number in terms of multiple of 10 and do the addition process as explained below. 

Example 1 : 

Evaluate :

12 + 5

Solution :

= 12 + 5

= 10 + 2 + 5

= 10 + 7

= 17

Example 2 : 

Evaluate :

14 + 8

Solution :

Here, 8 is close to the round figure 10. To make 8 as 10, we have to add 2 to 8. Take 2 from 14 and add it to 8 and do the rest of the process.

= 14 + 8

= 12 + 2 + 8

= 12 + 10

= 22

Adding Two-Digit Number and Two-Digit Number

Write the given two digit numbers in terms of multiple of 10 and do the addition process as explained below. 

Example 3 : 

Evaluate :

13 + 14

Solution :

= 13 + 14

= 10 + 3 + 10 + 4

= 10 + 10 + 3 + 4

= 20 + 7

= 27

Example 4 : 

Evaluate :

15 + 16

Solution :

= 15 + 16

= 10 + 10 + 5 + 6

= 10 + 5 + 10 + 6

= 20 + 11

= 31

Example 5 : 

Evaluate :

16 + 19

Solution :

Here, 19 is close to the round figure 20. To make 19 as 10, we have to add 1 to 19. Take 1 from 16 and add it to 19 and do the rest of the process.

= 16 + 19

= 15 + 1 + 19

= 15 + 20

= 35

Example 6 : 

Evaluate :

27 + 14

Solution :

Here, 27 is close to the round figure 30. To make 27 as 30, we have to add 3 to 27. Take 3 from 14 and add it to 27 and do the rest of the process.

= 27 + 14

= 27 + 3 + 11

= 30 + 11

= 41

Addition Table for 1

1 + 1 = 2

2 + 1 = 3

3 + 1 = 4

4 + 1 = 5

5 + 1 = 6

6 + 1 = 7

7 + 1 = 8

8 + 1 = 9

9 + 1 = 10

10 + 1 = 11

Addition Table for 3

1 + 3 = 4

2 + 3 = 5

3 + 3 = 6

4 + 3 = 7

5 + 3 = 8

6 + 3 = 9

7 + 3 = 10

8 + 3 = 11

9 + 3 = 12

10 + 3 = 13

Addition Table for 5

1 + 5 = 6

2 + 5 = 7

3 + 5 = 8

4 + 5 = 9

5 + 5 = 10

6 + 5 = 11

7 + 5 = 12

8 + 5 = 13

9 + 5 = 14

10 + 5 = 15

Addition Table for 7

1 + 7 = 8

2 + 7 = 9

3 + 7 = 10

4 + 7 = 11

5 + 7 = 12

6 + 7 = 13

7 + 7 = 14

8 + 7 = 15

9 + 7 = 16

10 + 7 = 17

Addition Table for 9

1 + 9 = 10

2 + 9 = 11

3 + 9 = 12

4 + 9 = 13

5 + 9 = 14

6 + 9 = 15

7 + 9 = 16

8 + 9 = 17

9 + 9 = 18

10 + 9 = 19

Addition Table for 11

1 + 11 = 12

2 + 11 = 13

3 + 11 = 14

4 + 11 = 15

5 + 11 = 16

6 + 11 = 17

7 + 11 = 18

8 + 11 = 19

9 + 11 = 20

10 + 11 = 21

Addition Table for 13

1 + 13 = 14

2 + 13 = 15

3 + 13 = 16

4 + 13 = 17

5 + 13 = 18

6 + 13 = 19

7 + 13 = 20

8 + 13 = 21

9 + 13 = 22

10 + 13 = 23

Addition Table for 15

1 + 15 = 16

2 + 15 = 17

3 + 15 = 18

4 + 15 = 19

5 + 15 = 20

6 + 15 = 21

7 + 15 = 22

8 + 15 = 23

9 + 15 = 24

10 + 15 = 25

Addition Table for 17

1 + 17 = 18

2 + 17 = 19

3 + 17 = 20

4 + 17 = 21

5 + 17 = 22

6 + 17 = 23

7 + 17 = 24

8 + 17 = 25

9 + 17 = 26

10 + 17 = 27

Addition Table for 19

1 + 19 = 20

2 + 19 = 21

3 + 19 = 22

4 + 19 = 23

5 + 19 = 24

6 + 19 = 25

7 + 19 = 26

8 + 19 = 27

9 + 19 = 28

10 + 19 = 29

Addition Table for 2

1 + 2 = 3

2 + 2 = 4

3 + 2 = 5

4 + 2 = 6

5 + 2 = 7

6 + 2 = 8

7 + 2 = 9

8 + 2 = 10

9 + 2 = 11

10 + 2 = 12

Addition Table for 4

1 + 4 = 5

2 + 4 = 6

3 + 4 = 7

4 + 4 = 8

5 + 4 = 9

6 + 4 = 10

7 + 4 = 11

8 + 4 = 12

9 + 4 = 13

10 + 4 = 14

Addition Table for 6

1 + 6 = 7

2 + 6 = 8

3 + 6 = 9

4 + 6 = 10

5 + 6 = 11

6 + 6 = 12

7 + 6 = 13

8 + 6 = 14

9 + 6 = 15

10 + 6 = 16

Addition Table for 8

1 + 8 = 9

2 + 8 = 10

3 + 8 = 11

4 + 8 = 12

5 + 8 = 13

6 + 8 = 14

7 + 8 = 15

8 + 8 = 16

9 + 8 = 17

10 + 8 = 18

Addition Table for 10

1 + 10 = 11

2 + 10 = 12

3 + 10 = 13

4 + 10 = 14

5 + 10 = 15

6 + 10 = 16

7 + 10 = 17

8 + 10 = 18

9 + 10 = 19

10 + 10 = 20

Addition Table for 12

1 + 12 = 13

2 + 12 = 14

3 + 12 = 15

4 + 12 = 16

5 + 12 = 17

6 + 12 = 18

7 + 12 = 19

8 + 12 = 20

9 + 12 = 21

10 + 12 = 22

Addition Table for 14

1 + 14 = 15

2 + 14 = 16

3 + 14 = 17

4 + 14 = 18

5 + 14 = 19

6 + 14 = 20

7 + 14 = 21

8 + 14 = 22

9 + 14 = 23

10 + 14 = 24

Addition Table for 16

1 + 16 = 17

2 + 16 = 18

3 + 16 = 19

4 + 16 = 20

5 + 16 = 21

6 + 16 = 22

7 + 16 = 23

8 + 16 = 24

9 + 16 = 25

10 + 16 = 26

Addition Table for 18

1 + 18 = 19

2 + 18 = 20

3 + 18 = 21

4 + 18 = 22

5 + 18 = 23

6 + 18 = 24

7 + 18 = 25

8 + 18 = 26

9 + 18 = 27

10 + 18 = 28

Addition Table for 20

1 + 20 = 21

2 + 20 = 22

3 + 20 = 23

4 + 20 = 24

5 + 20 = 25

6 + 20 = 26

7 + 20 = 27

8 + 20 = 28

9 + 20 = 29

10 + 20 = 30

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