Algebra 1 · Exponents

Adding and Subtracting Numbers in Scientific Notation

20 Q's Randomly Generated · Easy → Hard
To add or subtract numbers in scientific notation:
• Same exponents → add or subtract coefficients, keep the power of 10.
• Different exponents → rewrite so both have the same exponent, then add or subtract.
Always make sure your answer is in proper scientific notation (1 ≤ a < 10).
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