scientific notation

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5 Terms

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Scientific notation

Used in science for very small and very large numbers

2
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Scientific notation rules

  1. Start with the first single digit between 1 and 9 in the number

  2. Place a decimal point to the right of it

  3. After the decimal, write all other significant figures

  4. Multiply the number by 10

  5. Add an exponent to the 10 that is equal to the number of spots the decimal has moved

    • Numbers greater than 1 need a positive exponent

    • Numbers less than 1 need a negative exponent

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Significant figures

All certain figures plus the first uncertain one

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Rules for significant figures

  1. Non-zero digits are always significant

  2. Zeroes between two significant digits are significant

  3. Any leading zeroes are not significant

  4. If there is no decimal point, all the trailing zeroes are not significant

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HINT

Convert the number to scientific notation and then count the number of digits