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Multiply x * . () by eleven:
11 groups of or 11 lots of
For 0 to 9x11 just write the number twice 3x11=33 and 7x11=77
Learn your 11 times tables
Times by 10 then add another
Divide ÷ / by eleven:
How many times does 11 go into
Break into 11 groups
Reverse 11x tables 3x11=33 so 33÷11=3 and 33÷3=11
Add + eleven:
Add 1 to the tens and 1 to the ones digit
Add 10 then add 1
Take - eleven:
Take 1 from the tens digit then 1 from the ones digit
Take 1 then take 10
Number in grey (left) x number in grey (top) = number in white OR number in white ÷ number in grey = other number in grey.
| x | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 11 | 0 | 11 | 22 | 33 | 44 | 55 | 66 | 77 | 88 | 99 | 110 | 121 | 132 |
Number in grey (left) + number in grey (top) = number in white OR number in white - number in grey = other number in grey.
| + | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 11 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 |
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