1809 Times (1809×) Multiplication Table
1809 times table, 1 to 20
| 1809 × 1 | 1,809 |
| 1809 × 2 | 3,618 |
| 1809 × 3 | 5,427 |
| 1809 × 4 | 7,236 |
| 1809 × 5 | 9,045 |
| 1809 × 6 | 10,854 |
| 1809 × 7 | 12,663 |
| 1809 × 8 | 14,472 |
| 1809 × 9 | 16,281 |
| 1809 × 10 | 18,090 |
| 1809 × 11 | 19,899 |
| 1809 × 12 | 21,708 |
| 1809 × 13 | 23,517 |
| 1809 × 14 | 25,326 |
| 1809 × 15 | 27,135 |
| 1809 × 16 | 28,944 |
| 1809 × 17 | 30,753 |
| 1809 × 18 | 32,562 |
| 1809 × 19 | 34,371 |
| 1809 × 20 | 36,180 |
Patterns that help you remember it
- The last digits repeat in a cycle of 10: 9, 8, 7, 6, 5, 4, 3, 2, 1, 0.
- The digits of every answer add up to a multiple of 9.
- Split it into tens and ones: 1809 × k = 1800 × k + 9 × k.
- Each answer is 1809 more than the one before, so you can count on in steps of 1809.
Building it from tables you already know
To multiply 1809 by 9, multiply by 10 and take one 1809 away: 18,090 − 1809 = 16,281. To multiply by 11, multiply by 10 and add one more 1809: 18,090 + 1809 = 19,899. Multiplying by 4 is doubling twice: 1809 → 3,618 → 7,236.
Every multiple of 1809 is at least 1809, so there are none below 100 and 0 below 1,000. A number is in the 1809 times table exactly when it divides by 1809 with no remainder.
Odd, even and the last digit
Because 1809 is odd, the answers alternate between odd and even: 1809 × 1 = 1809 is odd, 1809 × 2 = 3,618 is even, and so on. Multiplying by 10 always puts a zero on the end: 1809 × 10 = 18,090, and 1809 × 100 = 180,900. Multiplying by 5 is half of multiplying by 10: half of 18,090 is 9,045.
Using the 1809 times table to divide
Every fact also works backwards: because 1809 × 7 = 12,663, you know 12,663 ÷ 1809 = 7 and 12,663 ÷ 7 = 1809. Practising the table and its division facts together halves the work.
1809 times table practice worksheet
- 1809 × 11 = ______
- 1809 × 4 = ______
- 1809 × 2 = ______
- 1809 × 2 = ______
- 1809 × 5 = ______
- 1809 × 9 = ______
- 1809 × 9 = ______
- 1809 × 12 = ______
- 1809 × 12 = ______
- 1809 × 5 = ______
- 1809 × 10 = ______
- 1809 × 1 = ______
Answer key
- 19,899
- 7,236
- 3,618
- 3,618
- 9,045
- 16,281
- 16,281
- 21,708
- 21,708
- 9,045
- 18,090
- 1,809
Word problems
Times tables are most useful when you can spot them in a question. Try these, then open each one to check:
- A box holds 1809 pencils. How many pencils are in 3 boxes?
Answer
3 × 1809 = 5,427 pencils. - Tickets cost $1809 each. How much do 5 tickets cost?
Answer
5 × $1809 = $9,045. - 3,618 chairs are set out in rows of 1809. How many rows are there?
Answer
3,618 ÷ 1809 = 2 rows. - A plant grows 1809 millimetres a week. How much does it grow in 11 weeks?
Answer
11 × 1809 = 19,899 millimetres.
Questions
What is 1809 × 12?
21,708.
What is half of 1809 × 8?
1809 × 8 = 14,472, and half of that is 7,236, which is 1809 × 4. Halving one factor halves the answer.
What is 1809 times 0?
0. Any number multiplied by zero is zero, because zero groups of 1809 contain nothing.
What is 1809 × 7 and 1809 × 8?
1809 × 7 = 12,663 and 1809 × 8 = 14,472. These two are the facts most people find hardest, so they are worth practising on their own.
Is 27,135 in the 1809 times table?
Yes: 27,135 ÷ 1809 = 15 with no remainder. 27,136 is not, because dividing it by 1809 leaves a remainder of 1.
How do I learn the 1809 times table quickly?
Learn it in order first, then use the patterns above and practise mixed questions; a few minutes a day works better than one long session.