helpp mom trying to help kids.. but have no clue how to..

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helpp mom trying to help kids.. but have no clue how to..

Postby mom » Thu Sep 30, 2004 6:38 am

300mg +14 centigrams + 6 decigrams - 14 decigrams= _____dg
can ya help me out here.. i can't even find what it is let alone do it.. between that problem and 16 hectograms +10 decigrams=____decigrams
i might go completly gray if i have any hair left after i pull it out.. please help me if you can show me how to do it so i can at least try and explain it
mom
 

you

Postby Hanna » Wed Feb 23, 2005 8:23 am

English please i so don't get it!! and umm wat the heck is a decigram???
Hanna
 

Re: you

Postby Guest » Tue Sep 19, 2006 10:52 am

Hanna wrote:English please i so don't get it!! and umm wat the heck is a decigram???
Guest
 

Re: helpp mom trying to help kids.. but have no clue how to.

Postby Guest » Tue Sep 19, 2006 5:05 pm

mom wrote:300mg +14 centigrams + 6 decigrams - 14 decigrams= _____dg
can ya help me out here.. i can't even find what it is let alone do it.. between that problem and 16 hectograms +10 decigrams=____decigrams
i might go completly gray if i have any hair left after i pull it out.. please help me if you can show me how to do it so i can at least try and explain it


You have to understand the relationship between prefixes and convert everything to a common prefix. For the first problem, I'd use decigrams (1/10 of a gram)
Since milli = 0.001 and deci = 0.1, the 300 mg is 3 dg. Similarlym the 14 cg is 1.4 dg. Now they are all alike and you can add and subtract.

The second problem can be approached the same way. It is not much different than finding a common denominator so you can add and subtract fractions.
Guest
 


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