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# What is an estimated digit?

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The last digit in any number is referred to as the estimated digit. In science, all other numbers are considered significant digits because they are precise measurements.

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The last number in a measurement in science is simply an estimation. For example, if a metal rod measures slightly over 234 inches, the final measurement can be rounded so the answer is 234 instead of 234.2. The more significant numbers a digit has, the more precise the measurement. A significant number includes all non-zero numbers, all zeros that fall between two significant digits and all zeros that are to the right of a decimal point or to the right of a non-zero number.

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## Related Questions

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A nonzero digit is a numerical digit that is not equal to zero. A digit is a numerical symbol that represents an integer from 0 to 9, so a nonzero digit is any digit from 1 to 9.

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The number one is neither prime nor composite. Prime numbers are positive integers greater than one that are evenly divisible only by themselves and one. Composite numbers are positive integers that have divisors other than themselves and one.

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A number that is multiplied by itself is called a base when it is written in exponential notation. Exponential notation consists of the number to be multiplied and a numeral in superscript to the right of it to indicate the number of times it is to be multiplied by itself.