Sumwise

638 Times (638×) Multiplication Table

638 times table, 1 to 20

638 × 1638
638 × 21,276
638 × 31,914
638 × 42,552
638 × 53,190
638 × 63,828
638 × 74,466
638 × 85,104
638 × 95,742
638 × 106,380
638 × 117,018
638 × 127,656
638 × 138,294
638 × 148,932
638 × 159,570
638 × 1610,208
638 × 1710,846
638 × 1811,484
638 × 1912,122
638 × 2012,760

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 638 is even.
  • Split it into tens and ones: 638 × k = 630 × k + 8 × k.
  • Each answer is 638 more than the one before, so you can count on in steps of 638.

Building it from tables you already know

Every answer in the 638 times table is double the answer in the 319 times table: 319 × 6 = 1,914, so 638 × 6 = 3,828. To multiply 638 by 9, multiply by 10 and take one 638 away: 6,380 − 638 = 5,742. To multiply by 11, multiply by 10 and add one more 638: 6,380 + 638 = 7,018. Multiplying by 4 is doubling twice: 638 → 1,276 → 2,552.

Every multiple of 638 is at least 638, so there are none below 100 and 1 below 1,000. A number is in the 638 times table exactly when it divides by 638 with no remainder.

Odd, even and the last digit

Because 638 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: 638 × 10 = 6,380, and 638 × 100 = 63,800. Multiplying by 5 is half of multiplying by 10: half of 6,380 is 3,190.

Using the 638 times table to divide

Every fact also works backwards: because 638 × 7 = 4,466, you know 4,466 ÷ 638 = 7 and 4,466 ÷ 7 = 638. Practising the table and its division facts together halves the work.

638 times table practice worksheet

  1. 638 × 11 = ______
  2. 638 × 10 = ______
  3. 638 × 11 = ______
  4. 638 × 6 = ______
  5. 638 × 4 = ______
  6. 638 × 5 = ______
  7. 638 × 10 = ______
  8. 638 × 1 = ______
  9. 638 × 6 = ______
  10. 638 × 6 = ______
  11. 638 × 5 = ______
  12. 638 × 12 = ______
Answer key
  1. 7,018
  2. 6,380
  3. 7,018
  4. 3,828
  5. 2,552
  6. 3,190
  7. 6,380
  8. 638
  9. 3,828
  10. 3,828
  11. 3,190
  12. 7,656

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 638 pencils. How many pencils are in 4 boxes?
    Answer4 × 638 = 2,552 pencils.
  2. Tickets cost $638 each. How much do 11 tickets cost?
    Answer11 × $638 = $7,018.
  3. 1,914 chairs are set out in rows of 638. How many rows are there?
    Answer1,914 ÷ 638 = 3 rows.
  4. A plant grows 638 millimetres a week. How much does it grow in 7 weeks?
    Answer7 × 638 = 4,466 millimetres.

About this page

The table, the patterns and the practice questions are all calculated for 638 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 638 × 12?

7,656.

What is half of 638 × 8?

638 × 8 = 5,104, and half of that is 2,552, which is 638 × 4. Halving one factor halves the answer.

What is 638 times 0?

0. Any number multiplied by zero is zero, because zero groups of 638 contain nothing.

What is 638 × 7 and 638 × 8?

638 × 7 = 4,466 and 638 × 8 = 5,104. These two are the facts most people find hardest, so they are worth practising on their own.

Is 9,570 in the 638 times table?

Yes: 9,570 ÷ 638 = 15 with no remainder. 9,571 is not, because dividing it by 638 leaves a remainder of 1.

How do I learn the 638 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.