4,000+500+10
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When you add numbers in scientific notation, it is best to convert them to their original decimal form, or at least change them so that they have the same exponent. Then when you are finished adding, simply put the solution is proper scientific notation.
0.00000005 in scientific notation is 5x10^(-8).
100,000,000 in scientific notation is: 1.0 × 108
The scientific notation for 0.00015 is: 1.5 × 10-4
71.7 in Scientific Notation = 7.17 x 101