<PRE><B>Question 1108353</B>
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Add the numbers 3.6 x 10^5 and 6.7 x 10^4 without WRITING the number in standard form. 
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Do them either all as 10^5  or as  10^4.


36 x 10^4 + 6.7 x 10^4


42.7 x 10^4


4.27 x 10^5


If keeping only two significant figures, then  4.3 x 10^5.</PRE>