1805 Times (1805×) Multiplication Table
1805 times table, 1 to 20
| 1805 × 1 | 1,805 |
| 1805 × 2 | 3,610 |
| 1805 × 3 | 5,415 |
| 1805 × 4 | 7,220 |
| 1805 × 5 | 9,025 |
| 1805 × 6 | 10,830 |
| 1805 × 7 | 12,635 |
| 1805 × 8 | 14,440 |
| 1805 × 9 | 16,245 |
| 1805 × 10 | 18,050 |
| 1805 × 11 | 19,855 |
| 1805 × 12 | 21,660 |
| 1805 × 13 | 23,465 |
| 1805 × 14 | 25,270 |
| 1805 × 15 | 27,075 |
| 1805 × 16 | 28,880 |
| 1805 × 17 | 30,685 |
| 1805 × 18 | 32,490 |
| 1805 × 19 | 34,295 |
| 1805 × 20 | 36,100 |
Patterns that help you remember it
- The last digits repeat in a cycle of 2: 5, 0.
- Every answer ends in 0 or 5.
- Split it into tens and ones: 1805 × k = 1800 × k + 5 × k.
- Each answer is 1805 more than the one before, so you can count on in steps of 1805.
Building it from tables you already know
To multiply 1805 by 9, multiply by 10 and take one 1805 away: 18,050 − 1805 = 16,245. To multiply by 11, multiply by 10 and add one more 1805: 18,050 + 1805 = 19,855. Multiplying by 4 is doubling twice: 1805 → 3,610 → 7,220.
Every multiple of 1805 is at least 1805, so there are none below 100 and 0 below 1,000. A number is in the 1805 times table exactly when it divides by 1805 with no remainder.
Odd, even and the last digit
Because 1805 is odd, the answers alternate between odd and even: 1805 × 1 = 1805 is odd, 1805 × 2 = 3,610 is even, and so on. Multiplying by 10 always puts a zero on the end: 1805 × 10 = 18,050, and 1805 × 100 = 180,500. Multiplying by 5 is half of multiplying by 10: half of 18,050 is 9,025.
Using the 1805 times table to divide
Every fact also works backwards: because 1805 × 7 = 12,635, you know 12,635 ÷ 1805 = 7 and 12,635 ÷ 7 = 1805. Practising the table and its division facts together halves the work.
1805 times table practice worksheet
- 1805 × 11 = ______
- 1805 × 6 = ______
- 1805 × 6 = ______
- 1805 × 5 = ______
- 1805 × 4 = ______
- 1805 × 7 = ______
- 1805 × 7 = ______
- 1805 × 11 = ______
- 1805 × 4 = ______
- 1805 × 12 = ______
- 1805 × 7 = ______
- 1805 × 2 = ______
Answer key
- 19,855
- 10,830
- 10,830
- 9,025
- 7,220
- 12,635
- 12,635
- 19,855
- 7,220
- 21,660
- 12,635
- 3,610
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 1805 pencils. How many pencils are in 3 boxes?
Answer
3 × 1805 = 5,415 pencils. - Tickets cost $1805 each. How much do 6 tickets cost?
Answer
6 × $1805 = $10,830. - 9,025 chairs are set out in rows of 1805. How many rows are there?
Answer
9,025 ÷ 1805 = 5 rows. - A plant grows 1805 millimetres a week. How much does it grow in 6 weeks?
Answer
6 × 1805 = 10,830 millimetres.
Questions
What is 1805 × 12?
21,660.
What is half of 1805 × 8?
1805 × 8 = 14,440, and half of that is 7,220, which is 1805 × 4. Halving one factor halves the answer.
What is 1805 times 0?
0. Any number multiplied by zero is zero, because zero groups of 1805 contain nothing.
What is 1805 × 7 and 1805 × 8?
1805 × 7 = 12,635 and 1805 × 8 = 14,440. These two are the facts most people find hardest, so they are worth practising on their own.
Is 27,075 in the 1805 times table?
Yes: 27,075 ÷ 1805 = 15 with no remainder. 27,076 is not, because dividing it by 1805 leaves a remainder of 1.
How do I learn the 1805 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.