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October 21, 2014

October 21, 2014

Posted by **Russell** on Wednesday, August 15, 2007 at 10:05pm.

Would you first subtract 4.8 from 19.2 then subtract 10 ^ 9 from 10 ^20

Leaving an answer of

14.4 x 10^11????

you are using the word "over", which implies division.

Why would you even consider subraction

(19.2 x 10 ^ 20) over (4.8 x 10 ^ 9)

=(19.2 x 10 ^ 20) ÷ (4.8 x 10 ^ 9)

= 19.2/4.8 * 10^20 / 10^9

= 4 * 10^11

Perhaps you were thinking of the procedure of dividing powers with the same base, where you

Thank you!!!! My mind is going blah.......first you divide number but then you just subtract then when you divide......this can be confusing, but I get it now :)

Thank you again!

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