Sumwise

1991 Times (1991×) Multiplication Table

1991 times table, 1 to 20

1991 × 11,991
1991 × 23,982
1991 × 35,973
1991 × 47,964
1991 × 59,955
1991 × 611,946
1991 × 713,937
1991 × 815,928
1991 × 917,919
1991 × 1019,910
1991 × 1121,901
1991 × 1223,892
1991 × 1325,883
1991 × 1427,874
1991 × 1529,865
1991 × 1631,856
1991 × 1733,847
1991 × 1835,838
1991 × 1937,829
1991 × 2039,820

Patterns that help you remember it

  • The last digits repeat in a cycle of 10: 1, 2, 3, 4, 5, 6, 7, 8, 9, 0.
  • Split it into tens and ones: 1991 × k = 1990 × k + 1 × k.
  • Each answer is 1991 more than the one before, so you can count on in steps of 1991.

Building it from tables you already know

To multiply 1991 by 9, multiply by 10 and take one 1991 away: 19,910 − 1991 = 17,919. To multiply by 11, multiply by 10 and add one more 1991: 19,910 + 1991 = 21,901. Multiplying by 4 is doubling twice: 1991 → 3,982 → 7,964.

Every multiple of 1991 is at least 1991, so there are none below 100 and 0 below 1,000. A number is in the 1991 times table exactly when it divides by 1991 with no remainder.

Odd, even and the last digit

Because 1991 is odd, the answers alternate between odd and even: 1991 × 1 = 1991 is odd, 1991 × 2 = 3,982 is even, and so on. Multiplying by 10 always puts a zero on the end: 1991 × 10 = 19,910, and 1991 × 100 = 199,100. Multiplying by 5 is half of multiplying by 10: half of 19,910 is 9,955.

Using the 1991 times table to divide

Every fact also works backwards: because 1991 × 7 = 13,937, you know 13,937 ÷ 1991 = 7 and 13,937 ÷ 7 = 1991. Practising the table and its division facts together halves the work.

1991 times table practice worksheet

  1. 1991 × 8 = ______
  2. 1991 × 5 = ______
  3. 1991 × 8 = ______
  4. 1991 × 1 = ______
  5. 1991 × 7 = ______
  6. 1991 × 7 = ______
  7. 1991 × 2 = ______
  8. 1991 × 5 = ______
  9. 1991 × 1 = ______
  10. 1991 × 7 = ______
  11. 1991 × 11 = ______
  12. 1991 × 8 = ______
Answer key
  1. 15,928
  2. 9,955
  3. 15,928
  4. 1,991
  5. 13,937
  6. 13,937
  7. 3,982
  8. 9,955
  9. 1,991
  10. 13,937
  11. 21,901
  12. 15,928

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 1991 pencils. How many pencils are in 7 boxes?
    Answer7 × 1991 = 13,937 pencils.
  2. Tickets cost $1991 each. How much do 8 tickets cost?
    Answer8 × $1991 = $15,928.
  3. 9,955 chairs are set out in rows of 1991. How many rows are there?
    Answer9,955 ÷ 1991 = 5 rows.
  4. A plant grows 1991 millimetres a week. How much does it grow in 9 weeks?
    Answer9 × 1991 = 17,919 millimetres.

About this page

The table, the patterns and the practice questions are all calculated for 1991 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 1991 × 12?

23,892.

What is half of 1991 × 8?

1991 × 8 = 15,928, and half of that is 7,964, which is 1991 × 4. Halving one factor halves the answer.

What is 1991 times 0?

0. Any number multiplied by zero is zero, because zero groups of 1991 contain nothing.

What is 1991 × 7 and 1991 × 8?

1991 × 7 = 13,937 and 1991 × 8 = 15,928. These two are the facts most people find hardest, so they are worth practising on their own.

Is 29,865 in the 1991 times table?

Yes: 29,865 ÷ 1991 = 15 with no remainder. 29,866 is not, because dividing it by 1991 leaves a remainder of 1.

How do I learn the 1991 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.