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0.5, written in scientific notation is 5 x 10^-1. The first digit of scientific notation is always between 0 and 10. The power of the ten can be thought of as how many 'hops' to the left or right the decimal place has to take to make the original number. A negative number is to the left, a positive is to the right. For instance, 0.001 will be 1 x 10^-3.

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16y ago

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