Read the question and read it again. What do you have to do?
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Find the mass of the butter.
What units are you using?
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grams (g)
Look at the scales.
Where is the arrow pointing?
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The arrow is pointing at the third mark after 200g.
There are five marks from 200g to 250g so each mark is worth 10g.
10g + 10g + 10g = 30g
200g + 30g = 230g