Does expressing a number in scientific notation change the value of the number (being expressed)?

no. no matter how you "express" a number, it does not change its value.

No, expressing a number in scientific notation does not change the value of the number being expressed. Scientific notation is a way to write very large or very small numbers in a more compact and standardized form.

In scientific notation, a number is expressed as the product of a coefficient and a power of 10. The coefficient is a number between 1 and 10 (inclusive), and the power of 10 indicates the magnitude of the number.

For example, the number 300,000 can be expressed in scientific notation as 3 x 10^5. Here, the coefficient is 3 (which is between 1 and 10), and the power of 10 is 5, indicating that the number is in the hundreds of thousands range.

Similarly, a very small number like 0.000025 can be expressed in scientific notation as 2.5 x 10^-5. Again, the coefficient is 2.5 (between 1 and 10) and the negative power of 10 (-5) indicates that the number is a very small fraction.

By expressing a number in scientific notation, we only change the representation of the number, not the actual value. It allows us to express and compare very large or very small numbers more easily and consistently.