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Subjects>Math>Math & Arithmetic

How do you know that 81.9 81.90 81.900 are the same number?

Anonymous

∙ 13y ago

Updated: 9/20/2023

Because they just have zeros after them.

Wiki User

∙ 13y ago

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Q: How do you know that 81.9 81.90 81.900 are the same number?

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Continue Learning about Math & Arithmetic

How do you know when a fraction is equivalent to a whole number?

You know when a fraction is equivalent to a whole number when both the numerator and denominator is the same. For example 2/2 is equivalent to the number two.

How should you know about perfect squares?

If you have a number like 12 and you multiply it by the same number: 12 and the answer you get is a whole number, then the whole number is the perfect square.

How do you work out 16 percent of a number?

You don't know where to start until you remember that 16% is the same as 0.16 . Then you just multiply the number by 0.16, and that product is 16% of the number.

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I dont know this question either i have the same one!

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You cannot know that. If you are told the total number of points for the test, you know (or count) the number of questions and you are told that each question is worth the same number of points then, and only then, each question is worth (total points/number of questions) points.

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