HipHopMath

The 11 times table

The 11 times table has a delightful pattern for the first nine facts.

11 times table, 1 to 12

  1. 11 × 1= 11
  2. 11 × 2= 22
  3. 11 × 3= 33
  4. 11 × 4= 44
  5. 11 × 5= 55
  6. 11 × 6= 66
  7. 11 × 7= 77
  8. 11 × 8= 88
  9. 11 × 9= 99
  10. 11 × 10= 110
  11. 11 × 11= 121
  12. 11 × 12= 132

Tricks for the 11 times table

Double digits

For 11 × 1 to 11 × 9, just repeat the digit: 11 × 4 = 44, 11 × 7 = 77.

Ten plus one

11 × 12 is 10 × 12 (120) plus 12, which makes 132.

Split and add for bigger numbers

For 11 × 23, write 2 _ 3 and put 2 + 3 = 5 in the middle: 253.

Look for the pattern

11, 22, 33, 44, 55, 66, 77, 88, 99, then 110 and 121 and 132.

An example

A football team has 11 players. How many players are in 6 teams?

6 × 11 = 66 players.

Once you can do these in your head, try the 11 times table game and see how big a beat you can build.

Frequently asked questions

What breaks the double-digit pattern?

From 11 × 10 onward the pattern changes: 110, 121, 132. Use 10 × n plus n to work them out.

Does the middle-digit trick always work?

It works nicely when the two digits add to 9 or less. If they add to more, carry the extra into the first digit.

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