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4.1 x 10^4 - 1 x 10^3 = ?

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cloversmith | Student, Grade 11 | eNotes Newbie

Posted June 15, 2009 at 8:28 PM via web

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4.1 x 10^4 - 1 x 10^3 = ?

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krishna-agrawala | College Teacher | Valedictorian

Posted June 15, 2009 at 9:11 PM (Answer #1)

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We have to find out the value of:

(4.1 x 10^4) - (1 x 10^3)

Now 10^4 = 10000, and 10^-3 = 1000

Therefore:

(4.1 x 10^4) - (1 x 10^3) = (4.1 x 10000) - (1 x 1000)

= 41000 - 1000

= 40000

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neela | High School Teacher | Valedictorian

Posted June 15, 2009 at 9:48 PM (Answer #2)

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10^4=10*10*10*10=10000

10^3=10*10*10=1000

First term:

4.1*10^4=4.1*10000=41000.0         (1), shifted decimals 4 places right as we multiplied by 10000.

Second term:

1*10^3=1*1000=1000.                   (2)

From(1) and(2):

4.1*10^4 -1*10^3 = 41000-1000 =40000 ,

(As 41 thousand-1 thousand =40 thosand  or

41 cow-1 cow =40 cow.)

 

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