Sumwise

1640 Times (1640×) Multiplication Table

1640 times table, 1 to 20

1640 × 11,640
1640 × 23,280
1640 × 34,920
1640 × 46,560
1640 × 58,200
1640 × 69,840
1640 × 711,480
1640 × 813,120
1640 × 914,760
1640 × 1016,400
1640 × 1118,040
1640 × 1219,680
1640 × 1321,320
1640 × 1422,960
1640 × 1524,600
1640 × 1626,240
1640 × 1727,880
1640 × 1829,520
1640 × 1931,160
1640 × 2032,800

Patterns that help you remember it

  • The last digits repeat in a cycle of 1: 0.
  • Every answer is even, because 1640 is even.
  • Every answer ends in 0 or 5.
  • Split it into tens and ones: 1640 × k = 1640 × k + 0 × k.
  • Each answer is 1640 more than the one before, so you can count on in steps of 1640.

Building it from tables you already know

Every answer in the 1640 times table is double the answer in the 820 times table: 820 × 6 = 4,920, so 1640 × 6 = 9,840. To multiply 1640 by 9, multiply by 10 and take one 1640 away: 16,400 − 1640 = 14,760. To multiply by 11, multiply by 10 and add one more 1640: 16,400 + 1640 = 18,040. Multiplying by 4 is doubling twice: 1640 → 3,280 → 6,560.

Every multiple of 1640 is at least 1640, so there are none below 100 and 0 below 1,000. A number is in the 1640 times table exactly when it divides by 1640 with no remainder.

Odd, even and the last digit

Because 1640 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: 1640 × 10 = 16,400, and 1640 × 100 = 164,000. Multiplying by 5 is half of multiplying by 10: half of 16,400 is 8,200.

Using the 1640 times table to divide

Every fact also works backwards: because 1640 × 7 = 11,480, you know 11,480 ÷ 1640 = 7 and 11,480 ÷ 7 = 1640. Practising the table and its division facts together halves the work.

1640 times table practice worksheet

  1. 1640 × 12 = ______
  2. 1640 × 5 = ______
  3. 1640 × 1 = ______
  4. 1640 × 9 = ______
  5. 1640 × 6 = ______
  6. 1640 × 1 = ______
  7. 1640 × 12 = ______
  8. 1640 × 5 = ______
  9. 1640 × 7 = ______
  10. 1640 × 2 = ______
  11. 1640 × 9 = ______
  12. 1640 × 9 = ______
Answer key
  1. 19,680
  2. 8,200
  3. 1,640
  4. 14,760
  5. 9,840
  6. 1,640
  7. 19,680
  8. 8,200
  9. 11,480
  10. 3,280
  11. 14,760
  12. 14,760

Word problems

Times tables are most useful when you can spot them in a question. Try these, then open each one to check:

  1. A box holds 1640 pencils. How many pencils are in 6 boxes?
    Answer6 × 1640 = 9,840 pencils.
  2. Tickets cost $1640 each. How much do 11 tickets cost?
    Answer11 × $1640 = $18,040.
  3. 4,920 chairs are set out in rows of 1640. How many rows are there?
    Answer4,920 ÷ 1640 = 3 rows.
  4. A plant grows 1640 millimetres a week. How much does it grow in 7 weeks?
    Answer7 × 1640 = 11,480 millimetres.

About this page

The table, the patterns and the practice questions are all calculated for 1640 when the page is opened, so every fact on it is exact. Use the options above the worksheet to change the number of questions or the largest multiplier.

Questions

What is 1640 × 12?

19,680.

What is half of 1640 × 8?

1640 × 8 = 13,120, and half of that is 6,560, which is 1640 × 4. Halving one factor halves the answer.

What is 1640 times 0?

0. Any number multiplied by zero is zero, because zero groups of 1640 contain nothing.

What is 1640 × 7 and 1640 × 8?

1640 × 7 = 11,480 and 1640 × 8 = 13,120. These two are the facts most people find hardest, so they are worth practising on their own.

Is 24,600 in the 1640 times table?

Yes: 24,600 ÷ 1640 = 15 with no remainder. 24,601 is not, because dividing it by 1640 leaves a remainder of 1.

How do I learn the 1640 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.