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104 LearnersLast updated on October 28, 2025
Addition Tables 1 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 1 to 20
An addition table from 1 to 20 shows the sums of all pairs of numbers between 1 and 20. These numbers are displayed in a grid where the first row and the first column have all numbers from 1 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 1 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 1 and 20 given below.
Tips and Tricks for Addition Tables 1 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 10 + 10. 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 1 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, 14 + 5; if you mistakenly use row 15 and column 5, you might write 20 instead of the correct answer, 14 + 5 = 19.
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 + 4 = 20, you don’t need to solve 4 + 16 again.
Mistake 3
Confusing doubles and near doubles
Always learn doubles first (like 8 + 8 = 16), then use them to solve near doubles. For example, if you know 10 + 10 = 20, then you can easily solve 10 + 11 = 21.
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 the row for 13, the sums should go 14, 15, 16, 17… 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 + 2 = 19, try imagining 17 apples and then adding 2 more to see the result.
Solved Examples on Addition Table 1 to 20
Problem 1
Find the sum of 14 + 6 using table
20
Explanation
In the addition table, look for 14 in the top row and 6 in the left column. The cell where they meet gives the result 20.
Problem 2
What is 18 + 2?
20
Explanation
To find 18 + 2 in the addition table, locate 18 in the top row and 2 in the left column. The cell where they meet shows the answer as 20.
Problem 3
If 10 is added to 10, what is their sum according to the table?
20
Explanation
In the addition table, find 10 in the top row and 10 in the side column; where they meet, the answer is 20. This is a double, so adding 10 and 10 always gives 20.
Problem 4
What do we get when we add 19 and 1?
20
Explanation
In the addition table, find 19 in the top row and 1 in the side column; where they meet, the answer is 20. Adding 1 to 19 also gives 20.
Problem 5
Use the table to find 13 + 7
20
Explanation
In the addition table, look at 13 in the top row and 7 in the side column; where they meet, the answer is 20. You can also count seven steps after 13 (14, 15, 16, 17, 18, 19, 20) to get 20.
FAQs on Addition Table 1 to 20
1.What is an addition table 1 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 1 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.
