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The table of 18 contains the list of natural numbers which are multiples of 18 and is also known as the Multiplication Table of 18. The table of 18 is a representation of the repeated addition of 18 to itself. It is one of the most complicated tables below 20 and is used in numerical problems across various fields.
Also Read: Multiplication and Division of Integers
| Table of Content |
Key Terms: Multiplication, Integers, Natural Numbers, Whole Numbers, Addition, Fractions
What is Multiplication?
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Multiplication is a basic arithmetic operation used widely in everyday life. It is defined as the product of two or more numbers. Multiplication basically means the repeated addition of a number with respect to another. Whole numbers, natural numbers, fractions, integers, etc. all can perform multiplication.
Multiplication is denoted by the symbol ‘x’.
Example: Multiplication of 2 and 3 means 2 is added to itself three times or 3 is added to itself two times.
2 + 2 + 2 = 6 or 3 + 3 = 6
Multiplication
Also Read:
| Related Topics | ||
|---|---|---|
| Addition and Subtraction | Natural numbers and Whole numbers | Types of Fractions |
| Algebraic Expressions | Relation between Lcm and HCF | Addition Table Chart 1 to 10 |
Table of 18
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Table of 18 is useful in solving algebraic problems such as LCM and HCF with good speed and accuracy.
Table of 18
For students to memorise the table of 18 up to 20 times is provided below.
| Table of 18 up to 20 times | ||||
|---|---|---|---|---|
| 18 | × | 1 | = | 18 |
| 18 | × | 2 | = | 36 |
| 18 | × | 3 | = | 54 |
| 18 | × | 4 | = | 72 |
| 18 | × | 5 | = | 90 |
| 18 | × | 6 | = | 108 |
| 18 | × | 7 | = | 126 |
| 18 | × | 8 | = | 144 |
| 18 | × | 9 | = | 162 |
| 18 | × | 10 | = | 180 |
| 18 | × | 11 | = | 198 |
| 18 | × | 12 | = | 216 |
| 18 | × | 13 | = | 234 |
| 18 | × | 14 | = | 252 |
| 18 | × | 15 | = | 270 |
| 18 | × | 16 | = | 288 |
| 18 | × | 17 | = | 306 |
| 18 | × | 18 | = | 324 |
| 18 | × | 19 | = | 342 |
| 18 | × | 20 | = | 360 |
Also Read: Closure Property
Tips to Remember Table of 18
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Learning the table of 18 might get tricky for some students. For their ease here are a few tips provided so they can quickly memorise and use the table.
Double the Table of 9
One can easily find the table of 18 if she remembers the table of 9. Table of 18 is double the value of table of 9. A chart is given below for a better understanding.
| Table of 9 | Multiplying by 2 | Table of 18 |
|---|---|---|
| 9 x 1 = 9 | 9 x 2 | 18 |
| 9 x 2 = 18 | 18 x 2 | 36 |
| 9 x 3 = 27 | 27 x 2 | 54 |
| 9 x 4 = 36 | 36 x 2 | 72 |
| 9 x 5 = 45 | 45 x 2 | 90 |
| 9 x 6 = 54 | 54 x 2 | 108 |
| 9 x 7 = 63 | 63 x 2 | 126 |
| 9 x 8 = 72 | 72 x 2 | 144 |
| 9 x 9 = 81 | 81 x 2 | 162 |
| 9 x 10 = 90 | 90 x 2 | 180 |
Here, the third column is representing the table of 18 whose values are double the values of table of 9.
Also Read: Real Numbers
Table of 20 minus Table of 2
If we subtract the respective of the table of 2 from the table of 20, we will get the table of 18. Below is the chart to understand better.
| Table of 20 | Table of 2 | Subtraction | Table of 18 |
|---|---|---|---|
| 20 | 2 | 20 – 2 | 18 |
| 40 | 4 | 40 – 4 | 36 |
| 60 | 6 | 60 – 6 | 54 |
| 80 | 8 | 80 – 8 | 72 |
| 100 | 10 | 100 – 10 | 90 |
| 120 | 12 | 120 – 12 | 108 |
| 140 | 14 | 140 – 14 | 126 |
| 160 | 16 | 160 – 16 | 144 |
| 180 | 18 | 180 – 18 | 162 |
| 200 | 20 | 200 – 20 | 180 |
Here, we can see that on subtracting the table of 2 from the table of 20, we have the table of 18.
Also Read: Decimal Expansion
Things to Remember
- Multiplication of two numbers is simply the value of their product.
- Multiplication is also defined as the repeated addition of a number with reference to another number.
- Table of 18 is two times the table of 9.
- When we subtract the table of 2 from the table of 20, the table of 18 is the result.
Sample Questions
Ques: If 18 boys bought 4 chocolates each, how many chocolates were total bought? [2 marks]
Ans: It is given that 18 boys bought 4 chocolates
Then, the total number of chocolates = 18 x 4 = 72.
Ques: If 18 dogs got 5 bones each, how many bones were there? [2 marks]
Ans: There were 18 dogs and each got 5 bones
Thus, the total number of bones = 18 x 5 = 70.
Ques: If 18 x h = 252, find the value of h. [2 marks]
Ans: Using the table given above we find that, 14 times 18 is equal to 252
Thus, 18 x h = 252
Therefore, h = 14
Ques: Find 182 + 12. [2 marks]
Ans: Using the table 182 = 18 x 18 = 324
Thus, 182 + 12 = 324 + 12 = 336.
Ques: If in a garden every plant has 7 flowers and there are a total of 18 plants, then calculate the total number of flowers. [2 marks]
Ans: Total number of plants = 18
Each plant has 7 flowers
Thus, the total number of flowers = 18 x 7 = 126
Ques: What will the value of 182 + 11(18)? [2 marks]
Ans: From the table value of 182 = 324
Now, 182 + 11(18) = 324 + 11 x 18 = 324 + 198
The value will be 522.
Ques: How is the table of 18 read? [2 marks]
Ans: The table of 18 is read in English as
18 ones are 18, 18 twos are 36, 18 threes are 54 and so on.
Ques: If there are 18 houses in a street and each house has 9 bulbs, calculate the total number of bulbs in the street. [2 marks]
Ans: Given that the total number of houses is 18 and each house has 9 bulbs
Thus, the total number of bulbs = 18 x 9 = 162.
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