Sumwise

643 Times (643×) Multiplication Table

643 times table, 1 to 20

643 × 1643
643 × 21,286
643 × 31,929
643 × 42,572
643 × 53,215
643 × 63,858
643 × 74,501
643 × 85,144
643 × 95,787
643 × 106,430
643 × 117,073
643 × 127,716
643 × 138,359
643 × 149,002
643 × 159,645
643 × 1610,288
643 × 1710,931
643 × 1811,574
643 × 1912,217
643 × 2012,860

Patterns that help you remember it

  • The last digits repeat in a cycle of 10: 3, 6, 9, 2, 5, 8, 1, 4, 7, 0.
  • Split it into tens and ones: 643 × k = 640 × k + 3 × k.
  • Each answer is 643 more than the one before, so you can count on in steps of 643.

Building it from tables you already know

To multiply 643 by 9, multiply by 10 and take one 643 away: 6,430 − 643 = 5,787. To multiply by 11, multiply by 10 and add one more 643: 6,430 + 643 = 7,073. Multiplying by 4 is doubling twice: 643 → 1,286 → 2,572.

Every multiple of 643 is at least 643, so there are none below 100 and 1 below 1,000. A number is in the 643 times table exactly when it divides by 643 with no remainder.

Odd, even and the last digit

Because 643 is odd, the answers alternate between odd and even: 643 × 1 = 643 is odd, 643 × 2 = 1,286 is even, and so on. Multiplying by 10 always puts a zero on the end: 643 × 10 = 6,430, and 643 × 100 = 64,300. Multiplying by 5 is half of multiplying by 10: half of 6,430 is 3,215.

Using the 643 times table to divide

Every fact also works backwards: because 643 × 7 = 4,501, you know 4,501 ÷ 643 = 7 and 4,501 ÷ 7 = 643. Practising the table and its division facts together halves the work.

643 times table practice worksheet

  1. 643 × 10 = ______
  2. 643 × 6 = ______
  3. 643 × 7 = ______
  4. 643 × 10 = ______
  5. 643 × 9 = ______
  6. 643 × 1 = ______
  7. 643 × 8 = ______
  8. 643 × 10 = ______
  9. 643 × 5 = ______
  10. 643 × 7 = ______
  11. 643 × 1 = ______
  12. 643 × 11 = ______
Answer key
  1. 6,430
  2. 3,858
  3. 4,501
  4. 6,430
  5. 5,787
  6. 643
  7. 5,144
  8. 6,430
  9. 3,215
  10. 4,501
  11. 643
  12. 7,073

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 643 pencils. How many pencils are in 3 boxes?
    Answer3 × 643 = 1,929 pencils.
  2. Tickets cost $643 each. How much do 7 tickets cost?
    Answer7 × $643 = $4,501.
  3. 3,215 chairs are set out in rows of 643. How many rows are there?
    Answer3,215 ÷ 643 = 5 rows.
  4. A plant grows 643 millimetres a week. How much does it grow in 11 weeks?
    Answer11 × 643 = 7,073 millimetres.

About this page

The table, the patterns and the practice questions are all calculated for 643 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 643 × 12?

7,716.

What is half of 643 × 8?

643 × 8 = 5,144, and half of that is 2,572, which is 643 × 4. Halving one factor halves the answer.

What is 643 times 0?

0. Any number multiplied by zero is zero, because zero groups of 643 contain nothing.

What is 643 × 7 and 643 × 8?

643 × 7 = 4,501 and 643 × 8 = 5,144. These two are the facts most people find hardest, so they are worth practising on their own.

Is 9,645 in the 643 times table?

Yes: 9,645 ÷ 643 = 15 with no remainder. 9,646 is not, because dividing it by 643 leaves a remainder of 1.

How do I learn the 643 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.