What is #(4.31\times 10^{4} ) + ( 3.9\times 10^{3} )#?

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Answer 1 · 2016-10-03T01:22:40

#(4.31xx10^4)+(3.9xx10^3)=(4.31xx10^4)+(0.39xx10^4)=4.7xx10^4#

We have:

#(4.31xx10^4)+(3.9xx10^3)#

There are different ways to do this. One would be to get rid of the scientific notation entirely and just add the numbers, like this:

#43100+3900=47000# and then put it back into scientific notation:

#47000=4.7xx10^4#

But we can also do it by having the scientific notations "line up" and then adding the numbers, like this:

#(4.31xx10^4)+(3.9xx10^3)=(4.31xx10^4)+(0.39xx10^4)=4.7xx10^4#