please demonstrate using cross multiplication to determine the answer? Thank you

1kg=1000g

1g=1000mg

1mg=1000mcg

so 789mg= 0.789g=0.000789kg=789000mcg....................................................best this answer

is there a way you can demonstrate solving with cross multiplication? I have several problems like this and would like to learn to use this method to solve. this is for a pharmacy tech class.

okay

1mg=0.001g

789mg=?

crossmultiplying gives 789*0.01/1= 0.789g

1g=0.001kg

0.789=?

we get 0.789*0.001/1= 0.000789kg

then 1mg=1000mcg

we get 789*1000/1= 789000mcg

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