Scientific notation is a way to express very large or very small numbers in a compact form.
To write 8,380,000 in scientific notation, move the decimal left until the number is between 1 and 10, then count the decimal places to determine the exponent of 10.
To write 0.00061 in scientific notation, move the decimal right until the number is between 1 and 10. Count the decimal places moved, and use a negative exponent.
To add numbers in scientific notation, the exponents of 10 must be the same. Once the exponents are equal, add the coefficients and keep the exponent unchanged.
To multiply numbers in scientific notation, first multiply the coefficients. Then, add the exponents of 10.
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