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Q: What determines the number of allowed significant digits when adding or subtracting?

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Pulled and mulled

When subtracting, the number moves to the left (negative direction). When adding, the number moves to the right (positive direction).

When you are adding or subtracting fractions.

No

Related questions

The least number of significant figures in any number of the problem determines the number of significant figures in the answer.

The least number of significant figures in any number of the problem determines the number of significant figures in the answer.

Make sure the answer is rounded to significant digits as well.

When adding and/or subtracting, your answer can only show as many decimal places as the measurement having the fewest number in the decimal places.

same number of significant digits

Subtracting a fraction is the same as adding its negative.

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The rule for significant figures is that when adding, subtracting, dividing, or applying any mathematical treatment, one cannot calculate a result that has more significant digits than that of the input with the least number of significant digits. This is because any result cannot be more accurate than the least accurate input.

Adding and subtracting polynomials is simply the adding and subtracting of their like terms.

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I learned to always change the denominators before adding or subtracting the numerators. You must always have a common denominator before adding or subtracting.

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