1680 Times (1680×) Multiplication Table
1680 times table, 1 to 20
| 1680 × 1 | 1,680 |
| 1680 × 2 | 3,360 |
| 1680 × 3 | 5,040 |
| 1680 × 4 | 6,720 |
| 1680 × 5 | 8,400 |
| 1680 × 6 | 10,080 |
| 1680 × 7 | 11,760 |
| 1680 × 8 | 13,440 |
| 1680 × 9 | 15,120 |
| 1680 × 10 | 16,800 |
| 1680 × 11 | 18,480 |
| 1680 × 12 | 20,160 |
| 1680 × 13 | 21,840 |
| 1680 × 14 | 23,520 |
| 1680 × 15 | 25,200 |
| 1680 × 16 | 26,880 |
| 1680 × 17 | 28,560 |
| 1680 × 18 | 30,240 |
| 1680 × 19 | 31,920 |
| 1680 × 20 | 33,600 |
Patterns that help you remember it
- The last digits repeat in a cycle of 1: 0.
- Every answer is even, because 1680 is even.
- Every answer ends in 0 or 5.
- Split it into tens and ones: 1680 × k = 1680 × k + 0 × k.
- Each answer is 1680 more than the one before, so you can count on in steps of 1680.
Building it from tables you already know
Every answer in the 1680 times table is double the answer in the 840 times table: 840 × 6 = 5,040, so 1680 × 6 = 10,080. To multiply 1680 by 9, multiply by 10 and take one 1680 away: 16,800 − 1680 = 15,120. To multiply by 11, multiply by 10 and add one more 1680: 16,800 + 1680 = 18,480. Multiplying by 4 is doubling twice: 1680 → 3,360 → 6,720.
Every multiple of 1680 is at least 1680, so there are none below 100 and 0 below 1,000. A number is in the 1680 times table exactly when it divides by 1680 with no remainder.
Odd, even and the last digit
Because 1680 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: 1680 × 10 = 16,800, and 1680 × 100 = 168,000. Multiplying by 5 is half of multiplying by 10: half of 16,800 is 8,400.
Using the 1680 times table to divide
Every fact also works backwards: because 1680 × 7 = 11,760, you know 11,760 ÷ 1680 = 7 and 11,760 ÷ 7 = 1680. Practising the table and its division facts together halves the work.
1680 times table practice worksheet
- 1680 × 9 = ______
- 1680 × 4 = ______
- 1680 × 8 = ______
- 1680 × 3 = ______
- 1680 × 10 = ______
- 1680 × 2 = ______
- 1680 × 5 = ______
- 1680 × 11 = ______
- 1680 × 12 = ______
- 1680 × 9 = ______
- 1680 × 8 = ______
- 1680 × 2 = ______
Answer key
- 15,120
- 6,720
- 13,440
- 5,040
- 16,800
- 3,360
- 8,400
- 18,480
- 20,160
- 15,120
- 13,440
- 3,360
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 1680 pencils. How many pencils are in 3 boxes?
Answer
3 × 1680 = 5,040 pencils. - Tickets cost $1680 each. How much do 4 tickets cost?
Answer
4 × $1680 = $6,720. - 6,720 chairs are set out in rows of 1680. How many rows are there?
Answer
6,720 ÷ 1680 = 4 rows. - A plant grows 1680 millimetres a week. How much does it grow in 9 weeks?
Answer
9 × 1680 = 15,120 millimetres.
Questions
What is 1680 × 12?
20,160.
What is half of 1680 × 8?
1680 × 8 = 13,440, and half of that is 6,720, which is 1680 × 4. Halving one factor halves the answer.
What is 1680 times 0?
0. Any number multiplied by zero is zero, because zero groups of 1680 contain nothing.
What is 1680 × 7 and 1680 × 8?
1680 × 7 = 11,760 and 1680 × 8 = 13,440. These two are the facts most people find hardest, so they are worth practising on their own.
Is 25,200 in the 1680 times table?
Yes: 25,200 ÷ 1680 = 15 with no remainder. 25,201 is not, because dividing it by 1680 leaves a remainder of 1.
How do I learn the 1680 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.