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There are infinitely many solutions for this. Choose any number for the first one.

Then subtract it from 1 to get the other number.

A few examples include:

  • 0.9262958666 and 0.0737041334
  • 0.000000000000005 and 0.999999999999995
  • 79.923466860104 and -78.923466860104
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Q: What two decimal numbers add up to 1?
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Related questions

How do you add decimal numbers?

Line up the decimal numbers like this, 100.5 + 9.0 then add normally and put in the decimal right below the decimal obove.^


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130.40 - 129.60 equals?

0.8000000000000114


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