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TEAS MathematicsOne digit, then a power of ten

Scientific NotationATI TEAS 7 cheat sheet

One digit, then a power of ten

9 key facts Reviewed Oct 2026
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The Form

  • a × 10ⁿ where 1 ≤ a < 10
  • 4,500 = 4.5 × 10³
  • 0.00032 = 3.2 × 10⁻⁴

Direction

  • Large number → positive exponent
  • Small number (less than 1) → negative exponent
  • Count the places you moved the decimal

Operations

  • Multiply → multiply the a's, add the exponents
  • Divide → divide the a's, subtract the exponents

Why

  • Lab values, cell counts and drug concentrations are written this way
Key takeaway

One digit, then a power of ten

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