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Multiply x * . () by zero:
No groups of or no lots of
The answer is always zero
3 lots of nothing is nothing
Zero divided by or divided by zero:
Zero divided by any number is zero
You cannot divide a number by zero
Add + zero:
The original number stays the same
7 plus nothing is 7
Take - zero:
The original number stays the same
9 take nothing is 9
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
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