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104 LearnersLast updated on October 28, 2025
Addition Tables 11 to 20
Addition is a basic math operation used to calculate the sum of numbers. An addition table shows numbers in rows and columns, forming a pattern that helps us quickly find the sum of two numbers without having to calculate them by hand.
What is Addition Table 11 to 20
An addition table from 11 to 20 shows the sums of all pairs of numbers between 11 and 20. These numbers are shown in a grid where the first row and the first column have all numbers from 11 to 20.
Each cell shows the sum of the numbers from its row and the numbers from its column. This table helps students solve problems more easily.
Addition Chart 11 to 20
The addition table is also known as the addition chart. Let us take a look at the addition chart for the sum of numbers between 11 and 20 given below.
Tips and Tricks for Addition Tables 11 to 20
As the numbers get larger, addition tables become harder to memorize. Here are a few tips and tricks to help learn them.
- Use the commutative property. Since addition is commutative, you only need to learn half the table because the other half is just its mirror.
- Learn doubles such as . They act as quick mental math shortcuts.
- Notice the diagonal pattern.
- Each number is 2 greater than the one before it, which helps in building the table quickly.
Common Mistakes and How to Avoid Them in Addition Tables 11 to 20
Sometimes, even visual tools like addition tables can be confusing. Here’s a list of errors students might make while working with these tables, along with ways to avoid them.
Mistake 1
Mixing up rows or columns
Always double-check the row and column before writing the sum. For example, 13 + 15, if you mistakenly use row 14 and column 15, you might write 29 instead of the correct answer, 14 + 15 = 29.
Mistake 2
Forgetting the commutative property
Always remember that a + b = b + a, so you don’t need to calculate both separately. For example, if you already know 16 + 12 = 28, you don’t need to solve 12 + 16 again.
Mistake 3
Confusing doubles and near doubles
Always learn doubles first (like 14 + 14 = 28), then use them to solve near doubles. For example, if you know 15 + 15 = 30, then you can easily solve 15 + 16 = 31.
Mistake 4
Skipping numbers in sequence
Always remember to follow the pattern. Each number in a row or column increases by 1. For example, in row for 13, the sums should go 24, 25, 26, 27… If you skip a number, the sequence will be incorrect.
Mistake 5
Memorizing without practice
Practice regularly with objects or flashcards to strengthen the understanding. For example, instead of just memorizing that 17 + 12 = 29, try imagining 17 apples and then adding 12 more to see the result.
Solved Examples on Addition Table 11 to 20
Problem 1
Find the sum of 14 + 13 using table
27
Explanation
In the addition table, look for 14 in the top row and 13 in the left column. The cell where they meet gives the result 27.
Problem 2
What is 16 + 12?
28
Explanation
To find 16 + 12 in the addition table, locate 16 in the top row and 12 in the left column. The cell where they meet shows the answer as 28.
Problem 3
If 15 is added to 15, what is their sum according to the table?
30
Explanation
In the addition table, find 15 in the top row and 15 in the side column; where they meet, the answer is 30. This is a double, so adding 15 and 15 always gives 30.
Problem 4
What do we get when we add 19 and 11?
30
Explanation
In the addition table, find 19 in the top row and 11 in the side column; where they meet, the answer is 30. Adding 11 to 19 also gives 30.
Problem 5
Use the table to find 17 + 13
30
Explanation
In the addition table, look at 17 in the top row and 13 in the side column; where they meet, the answer is 30. You can also count thirteen steps after 17 to get 30.
FAQs on Addition Table 11 to 20
1.What is an addition table 11 to 20?
2.Why is the addition table useful?
3.How do I use the addition table?
4.Do I need to learn the whole table?
5.What is the benefit of learning the addition table?
Important Glossary of Addition Tables 11 to 20
- Addition - It is the process of combining two or more numbers to find their sum.
- Double - Doubles are when a number is added to itself.
- Intersection - It is the important point where a row and a column meet in a table.
- Commutative property - The commutative property means you can add numbers in any order and the answer will be the same.
- Diagonal - A diagonal is a straight line that connects one corner of a table or shape to a non-adjacent corner.
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Hiralee Lalitkumar Makwana
About the Author
Hiralee Lalitkumar Makwana has almost two years of teaching experience. She is a number ninja as she loves numbers. Her interest in numbers can be seen in the way she cracks math puzzles and hidden patterns.
Fun Fact
: She loves to read number jokes and games.
