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    (Original post by heyitscraziix)
    Help in general
    It's simple

    For example

    (3 \times 10^4) \times (8 \times 10^5) = (3 \times 8) \times 10^{4+5} = 24 \times 10^9

    24 isn't in standard form because it's not between 1 and 10. The trick is to divide 24 by ten and add one to the power, so you're left with

    2.4 \times 10^{10}
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    (Original post by Indeterminate)
    It's simple

    For example

    (3 \times 10^4) \times (8 \times 10^5) = (3 \times 8) \times 10^{4+5} = 24 \times 10^9

    24 isn't in standard form because it's not between 1 and 10. The trick is to divide 24 by ten and add one to the power, so you're left with

    2.4 \times 10^{10}
    Is 2.4 \times 10^{10} really 24 in standard form?

    240000000000.
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    (Original post by Louisb19)
    Is 2.4 \times 10^{10} really 24 in standard form?

    240000000000.
    I never said that.

    My point was that

     a \times 10^b

    is only in standard form if a is between 1 and 10.
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    (Original post by Indeterminate)
    I never said that.

    My point was that

     a \times 10^b

    is only in standard form if a is between 1 and 10.
    Ohhhh.
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    [QUOTE=Indeterminate;59999373]It's simple

    For example

    (3 \times 10^4) \times (8 \times 10^5) = (3 \times 8) \times 10^{4+5} = 24 \times 10^9

    24 isn't in standard form because it's not between 1 and 10. The trick is to divide 24 by ten and add one to the power, so you're left with

    2.4 \times 10^{10}[/QUOTE


    ohmygod!! Thank u so much!!
    My teacher confused me!!
    So what if its 2.45 ?
    Is it 2.45 to the power 10 2
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    (Original post by heyitscraziix)
    (Original post by Indeterminate)
    It's simple

    For example

    (3 \times 10^4) \times (8 \times 10^5) = (3 \times 8) \times 10^{4+5} = 24 \times 10^9

    24 isn't in standard form because it's not between 1 and 10. The trick is to divide 24 by ten and add one to the power, so you're left with

    2.4 \times 10^{10}

    ohmygod!! Thank u so much!!
    My teacher confused me!!
    So what if its 2.45 ?
    Is it 2.45 to the power 10 2
    If the numbers were, for example, 5 and 4.9, then you'd get

    5 \times 4.9 = 24.5

    But then you'd just do exactly the same thing and get 2.45 instead
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    (Original post by Indeterminate)
    If the numbers were, for example, 5 and 4.9, then you'd get

    5 \times 4.9 = 24.5

    But then you'd just do exactly the same thing and get 2.45 instead
    What about division?
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    (Original post by heyitscraziix)
    What about division?
    For example

    (5.4 \times 10^{-5}) \div (9 \times 10^3) = (5.4 \div  9) \times (10^{-5} \div 10^3) =  0.6 \times 10^{-8}

    0.6 isn't between 1 and 10, so you have to multiply it by 10 and reduce the power by 1. That leaves you with

    6 \times 10^{-9}

    Practice makes perfect I guess.
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    (Original post by Indeterminate)
    For example

    (5.4 \times 10^{-5}) \div (9 \times 10^3) = (5.4 \div  9) \times (10^{-5} \div 10^3) =  0.6 \times 10^{-8}

    0.6 isn't between 1 and 10, so you have to multiply it by 10 and reduce the power by 1. That leaves you with

    6 \times 10^{-9}

    Practice makes perfect I guess.
    i was confused about this topic as well but this made it so much clear thanks
 
 
 
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