# metric conversion confusion

• Sep 9th 2012, 08:11 AM
Louisana1
metric conversion confusion
0.75 kg to mg

0.75 kg x 1000000mg
1kg

i multiplied 1000000x0.75
by hand and came up with the wrong answer don't know what i did wrong
0750000.00

by I know the answer should be 7.5 x 10^5

• Sep 9th 2012, 08:48 AM
MarkFL
Re: metric conversion confusion
Your result is the same as the given result in scientific notation.

$\displaystyle 0.75\text{ kg}\cdot\frac{10^6\text{ mg}}{1\text{ kg}}=0.75\times10^6\text{ mg}=7.5\times10^5\text{ mg}$
• Sep 9th 2012, 10:04 AM
Louisana1
Re: metric conversion confusion
1500 millimeters to km

1500 mm x 1 km
10^6

1.5 x 10^5 is the answer
I am not sure if this is right
• Sep 9th 2012, 10:21 AM
MarkFL
Re: metric conversion confusion
$\displaystyle 1.5\times10^3\text{ mm}\cdot\frac{1\text{ km}}{10^6\text{ mm}}=1.5\times10^{-3}\text{ km}$
• Sep 9th 2012, 10:23 AM
Louisana1
Re: metric conversion confusion
where did you get 10 ^3 from
• Sep 9th 2012, 10:26 AM
MarkFL
Re: metric conversion confusion
$\displaystyle 1500=1.5\times10^3$
• Sep 9th 2012, 11:39 AM
Louisana1
Re: metric conversion confusion
ok now did you subtract the exponents

3-6=-3
• Sep 9th 2012, 01:27 PM
Louisana1
Re: metric conversion confusion
why did you make 10^6 to 10^5