Posted by **Adry** on Wednesday, August 2, 2006 at 5:47pm.

I BELEIVE THAT IS WHAT IT IS CALLED. WE ARE STARTING TO GO INTO THIS SYSTEM AT SCHOOL. DOES ANYONE HAVE ANY SUGGESTIONS AS THE BEST WAY TO LEARN THIS. IT IS CONFUSING FOR ME.

Memorize the prefixes; i.e., milli, centi, deci, etc. (and their order), then everything converts by a factor of 10 from one to another. Post one or two or your problems and tell us what you are having trouble understanding.

Well it's going from any units to others and weight as well. I just wouldn't even know what to post. I would like to know if there is a way to help me know when to multiply when to divide (10's) and how to know to get from one unit to another if I am given a question of centimeters and mm to go to dcm to whatever else there is.

The easy way to do it is to make sure the units you don't want cancel to leave the units you want to keep. For example, convert 1.20 cm to mm. I know that 1 cm = 10 mm; therefore,

1.20 <color=blue>cm</color=blue> x (10 <color=red>mm</color=red>/1 <color=blue>cm</color=blue>) = 12.0 <color=red>mm</color=red>

I hope the colors turn out ok. Note how the cm (color blue and in the numerator) cancels with cm in the denominator--also colored blue) but nothing cancels out the mm unit in the numerator (colored red) so the unit we get is mm. Tell us what you don't understand about this if it isn't clear.

**The colors didn't work for me so here is another post with all that garbage omitted.**
The easy way to do it is to make sure the units you don't want cancel to leave the units you want to keep. For example, convert 1.20 cm to mm. I know that 1 cm = 10 mm; therefore,

**1.20 cm x(10 mm/1 cm) = 12.0 mm **
Note how the cm in the numerator cancels with cm in the denominator but nothing cancels out the mm unit in the numerator so the unit we get is mm. Tell us what you don't understand about this if it isn't clear.

the speed limit on the highway is usually 106.6_/h or 29_/s

i hate metrics

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