The 20 times table is easy to calculate once you connect it to the 2 times table. Since 20 is 2 × 10, you can double the number and then multiply the result by 10.
Use the interactive lesson below to learn the table of 20 from 20 × 1 to 20 × 12, practice the multiplication facts, and discover shortcuts that also work when multiplying larger numbers by 20.
The shortcut
Double the number, then multiply by 10.
For example: 20 × 7 → 2 × 7 = 14 → 14 × 10 = 140
Learn • Practice • Master
20 Times Table
Learn the 20 times table from 1 to 12, practice the facts you miss, then test your speed.
Multiplication chart
20 Times Table Chart
| Calculation | Answer |
|---|---|
| 20 × 1 | 20 |
| 20 × 2 | 40 |
| 20 × 3 | 60 |
| 20 × 4 | 80 |
| 20 × 5 | 100 |
| 20 × 6 | 120 |
| 20 × 7 | 140 |
| 20 × 8 | 160 |
| 20 × 9 | 180 |
| 20 × 10 | 200 |
| 20 × 11 | 220 |
| 20 × 12 | 240 |
Memory helper
See the pattern
Practice mode
Build accuracy
What is
Speed test
How many can you answer?
Answer as many 20 times table questions as you can before the timer ends.
Speed question
Mental math shortcut
Use the 2 Times Table to Multiply by 20
Multiplying by 20 can be broken into two simple steps. First multiply the number by 2, then multiply that answer by 10.
This works because 20 = 2 × 10.
20 × 4 = 80
20 × 7 = 140
20 × 9 = 180
To calculate 20 × 8:
First calculate 2 × 8 = 16.
Then multiply 16 by 10.
16 × 10 = 160.
Therefore, 20 × 8 = 160.
If you already know the 2 times table, you already have the main skill needed to calculate the 20 times table.
Number sequence
Count Forward in Steps of 20
The multiples of 20 increase by exactly 20 each time. From 20 × 1 through 20 × 12, the sequence is:
40
60
80
100
120
140
160
180
200
220
240
Knowing this sequence is useful when you remember one multiplication fact but not the next one.
If you know 20 × 7 = 140, add another 20:
140 + 20 = 160
so 20 × 8 = 160.
Spot the pattern
What Pattern Does the 20 Times Table Follow?
Every whole-number multiple of 20 ends in 0. Looking more closely, the final two digits alternate between 20, 40, 60, 80 and 00 before the pattern begins again in the next hundred.
= 60
= 100
= 200
Another useful observation is that every multiple of 20 is also a multiple of 2, 4, 5 and 10.
Quick check: if you multiply a whole number by 20 and your answer does not end in 0, the answer cannot be correct.
Useful connection
Double the 10 Times Table
Another way to understand multiplication by 20 is to start with the 10 times table. Since 20 is twice 10, simply double the corresponding 10 times table answer.
20 × 3 = 60
20 × 6 = 120
20 × 11 = 220
This gives you two closely related strategies: double the number and multiply by 10, or multiply by 10 and double the answer. Both produce the same result.
Reverse the calculation
Use Half of the 40 Times Table
If you happen to know a multiplication fact involving 40, you can also work backwards. Since 20 is half of 40, a 20 times table answer is half of the corresponding 40 times table answer.
20 × 4 = 80
20 × 7 = 140
20 × 10 = 200
This is not usually the fastest way to learn the table, but it demonstrates how multiplication facts are connected and can be used to check one another.
Beyond memorization
How to Multiply Larger Numbers by 20
The same doubling strategy works beyond 20 × 12. This makes multiplication by 20 particularly useful for mental math.
20 × 15 = 300
20 × 25 = 500
20 × 35 = 700
To calculate 20 × 24:
Double 24 → 48
Multiply 48 by 10 → 480
Therefore, 20 × 24 = 480.
Once you understand this method, you do not need to memorize a separate 20 times table fact for every possible number.
Real-world calculation
Using Multiples of 20 in Everyday Math
Multiplication by 20 is useful whenever objects, prices or quantities are arranged in groups of twenty.
Suppose there are 20 items in each box and you have 8 boxes. The total number of items is:
20 × 8 = 160 items
You can calculate the answer mentally by doubling 8 to get 16 and then multiplying by 10 to get 160.
The same reasoning works with larger quantities. For example, 20 groups of 25 contain 500 items because 20 × 25 = 500.
Test your understanding
20 Times Table Practice Questions
Try each question before opening the answer. Use doubling followed by ×10 whenever the answer does not come to mind immediately.
What is 20 × 4?
What is 20 × 6?
If 10 × 7 = 70, what is 20 × 7?
If 20 × 8 = 160, what is 20 × 9?
What is 20 × 11?
What is 20 × 12?
Challenge yourself
Can You Multiply These Numbers by 20?
These questions go beyond the standard 1-to-12 table. Try using the double then ×10 strategy instead of repeated addition.
What is 20 × 15?
What is 20 × 25?
What is 20 × 40?
What is 20 × 50?
Quick answers
20 Times Table Questions
What is 20 × 5?
20 × 5 = 100.
What is 20 × 6?
20 × 6 = 120.
What is 20 × 7?
20 × 7 = 140.
What is 20 × 8?
20 × 8 = 160.
What is 20 × 9?
20 × 9 = 180.
What is 20 × 10?
20 × 10 = 200.
What is 20 × 11?
20 × 11 = 220.
What is 20 × 12?
20 × 12 = 240.
What is the easiest way to multiply by 20?
Double the number and then multiply the result by 10. For example, for 20 × 7, double 7 to get 14 and then calculate 14 × 10 = 140.
What are the first 12 multiples of 20?
The first 12 positive multiples of 20 are 20, 40, 60, 80, 100, 120, 140, 160, 180, 200, 220 and 240.
