How do you add $4.77 x 10^4$ and $8.62 x 10^5$ ?

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Answer 1 · 2015-04-06T12:42:59

You first take them to the same $10$ -power

$4.77*10^4=0.477*10^5$

Now you can add:

$0.477*10^5+8.62*10^5=$
$(0.477+8.62)*10^5=$
$9.097*10^5~~9.10*10^5$
(rounded to three significant digits)

How do you add 4.77 x 10^44.77 x 10^4 and 8.62 x 10^58.62 x 10^5?