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Scientific Notation
Scientific notation is the expression of a number based on the largest exponent of 10 for its value, where the form is a decimal number A x 10n.
6,389 Questions
How do you put things out of scientific notation?
If the exponent is positive, move the decimal to the right the same number of spaces as the number of the exponent. If the exponent is negative, move the decimal to the left the same number of spaces as the number of the exponent.
Examples:
2.5 x 103 is 2500 in standard notation. (Move the decimal to the right 3 spaces.)
4.9 x 10-5 is 0.000049 in standard notation. (Move the decimal to the left 5 spaces.)
Why is scientific notation used in science and math?
Purely a matter of convenience. It's much easier to write, read, say, and remember 6.023 x 1023
than it would be to write, read, say, or remember 602,300,000,000,000,000,000,000.
And it's a lot easier to add, subtract, multiply, or divide two of that kind of number
if they're presented in scientific notation.
How is ten billion expressed in standard form?
Ten billion (10,000,000,000*) expressed in standard form is: 1.0 × 1010
*this is the standard notation
How do you change 0.0025 to scientific notation?
It is: 2.5*10-3 which means that the decimal point must be moved 3 places to the left to go back to 0.0025
