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Infinitely many.

Start with additions:

1 + 12, 2 + 11, etc

Then look at numbers with one decimal point:

0.1 + 12.9, 0.2 + 12.8, etc

and then 2 decimal places, 3 dp, 4 dp and so on.

Next, look at combinations of three number, four numbers etc.

And that is only addition. Addition combined with subtraction offers a lot more possibilities.

And then there are multiplication, division, exponentiation and so on.

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12y ago

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