Åk 6–9
 
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3.5 Units
We learned in section 3.1 that the different prefixes: deci, centi and milli mean tenths, hundredths, and thousandths.

We commonly use them together with units like meters or liters for example.



Example A


You might know that a soft drink bottle contains 33 centiliters (33 cl).



Foto: Fredrik Enander
Centi means, of course, hundredths and:
33 cl = 33 hundredths of a liter = 0.33 liters




Example B


A ruler can be 3 decimeters (3 dm).


Foto: Nils Sundberg,
Multimediabyrån
Deci means tenths:
3 dm = 3 tenths of a meter = 0.3 meter  




Example C



The active ingredient in a headache pill can weigh 10 milligrams (10 mg).


Foto: Nils Sundberg,
Multimediabyrån
Milli means thousandths and:
10 mg
= thousands of a gram = 0.010 grams