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How do you write $1,990$ in scientific notation? $\newline$ $\_\_\_\_\_ \times 10^{\_\_\_\_\_}$

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Convert between standard and scientific notation

Full solution

Q. How do you write

1,990

in scientific notation?

\newline

\_\_\_\_\_ \times 10^{\_\_\_\_\_}

Find Coefficient: What will be the coefficient when $1,990$ is written in scientific notation? $\newline$ We need to move the decimal to the left until the number is greater than or equal to $1$ and less than $10$ . $\newline$ Coefficient: $1.99$
Sign of Exponent: Would $1,990$ have a positive or negative exponent when written in scientific notation? $1,990$ is a number greater than $10$ . It will be represented by a positive exponent.
Calculate Exponent: What is the exponent when $1,990$ is written in scientific notation? $\newline$ We moved the decimal to the left $3$ times to make the coefficient $1.99$ . $\newline$ $1,990 = 1.99 \times 10^3$ $\newline$ Exponent: $3$
Write in Scientific Notation: Fill in the values to write $1,990$ in scientific notation. $\newline$ Substitute $1.99$ for the coefficient and $3$ for the exponent in the expression $a \times 10^b$ . $\newline$ Scientific notation: $1.99 \times 10^3$

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