What is #(8.1*10^4) - (6*10^3)#?

1 Answer
Daniel L.
May 31, 2016

The result is #75000# or #7.5*10^4# in scientific notation.

Explanation:

To add or substract two numbers in scientiffic notation you first have to express them using the same power of #10# and then perform addition (or substraction) on numbers multiplied by the power of #10#. Final step is to change the exponent back.

#8.1xx10^4-6*10^3=81xx10^3-6xx10^3=75xx10^3#
#=7.5xx10^4#

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