1638 Times (1638×) Multiplication Table
1638 times table, 1 to 20
| 1638 × 1 | 1,638 |
| 1638 × 2 | 3,276 |
| 1638 × 3 | 4,914 |
| 1638 × 4 | 6,552 |
| 1638 × 5 | 8,190 |
| 1638 × 6 | 9,828 |
| 1638 × 7 | 11,466 |
| 1638 × 8 | 13,104 |
| 1638 × 9 | 14,742 |
| 1638 × 10 | 16,380 |
| 1638 × 11 | 18,018 |
| 1638 × 12 | 19,656 |
| 1638 × 13 | 21,294 |
| 1638 × 14 | 22,932 |
| 1638 × 15 | 24,570 |
| 1638 × 16 | 26,208 |
| 1638 × 17 | 27,846 |
| 1638 × 18 | 29,484 |
| 1638 × 19 | 31,122 |
| 1638 × 20 | 32,760 |
Patterns that help you remember it
- The last digits repeat in a cycle of 5: 8, 6, 4, 2, 0.
- Every answer is even, because 1638 is even.
- The digits of every answer add up to a multiple of 9.
- Split it into tens and ones: 1638 × k = 1630 × k + 8 × k.
- Each answer is 1638 more than the one before, so you can count on in steps of 1638.
Building it from tables you already know
Every answer in the 1638 times table is double the answer in the 819 times table: 819 × 6 = 4,914, so 1638 × 6 = 9,828. To multiply 1638 by 9, multiply by 10 and take one 1638 away: 16,380 − 1638 = 14,742. To multiply by 11, multiply by 10 and add one more 1638: 16,380 + 1638 = 18,018. Multiplying by 4 is doubling twice: 1638 → 3,276 → 6,552.
Every multiple of 1638 is at least 1638, so there are none below 100 and 0 below 1,000. A number is in the 1638 times table exactly when it divides by 1638 with no remainder.
Odd, even and the last digit
Because 1638 is even, every answer in its table is even, which is a quick way to catch a wrong answer. Multiplying by 10 always puts a zero on the end: 1638 × 10 = 16,380, and 1638 × 100 = 163,800. Multiplying by 5 is half of multiplying by 10: half of 16,380 is 8,190.
Using the 1638 times table to divide
Every fact also works backwards: because 1638 × 7 = 11,466, you know 11,466 ÷ 1638 = 7 and 11,466 ÷ 7 = 1638. Practising the table and its division facts together halves the work.
1638 times table practice worksheet
- 1638 × 12 = ______
- 1638 × 7 = ______
- 1638 × 4 = ______
- 1638 × 10 = ______
- 1638 × 5 = ______
- 1638 × 9 = ______
- 1638 × 5 = ______
- 1638 × 2 = ______
- 1638 × 5 = ______
- 1638 × 11 = ______
- 1638 × 2 = ______
- 1638 × 1 = ______
Answer key
- 19,656
- 11,466
- 6,552
- 16,380
- 8,190
- 14,742
- 8,190
- 3,276
- 8,190
- 18,018
- 3,276
- 1,638
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 1638 pencils. How many pencils are in 6 boxes?
Answer
6 × 1638 = 9,828 pencils. - Tickets cost $1638 each. How much do 12 tickets cost?
Answer
12 × $1638 = $19,656. - 8,190 chairs are set out in rows of 1638. How many rows are there?
Answer
8,190 ÷ 1638 = 5 rows. - A plant grows 1638 millimetres a week. How much does it grow in 11 weeks?
Answer
11 × 1638 = 18,018 millimetres.
Questions
What is 1638 × 12?
19,656.
What is half of 1638 × 8?
1638 × 8 = 13,104, and half of that is 6,552, which is 1638 × 4. Halving one factor halves the answer.
What is 1638 times 0?
0. Any number multiplied by zero is zero, because zero groups of 1638 contain nothing.
What is 1638 × 7 and 1638 × 8?
1638 × 7 = 11,466 and 1638 × 8 = 13,104. These two are the facts most people find hardest, so they are worth practising on their own.
Is 24,570 in the 1638 times table?
Yes: 24,570 ÷ 1638 = 15 with no remainder. 24,571 is not, because dividing it by 1638 leaves a remainder of 1.
How do I learn the 1638 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.