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15-03-2018
Mathematics

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A new pencil weighs 25 grams. After the pencil has been used for a while, it weighs 2 decagrams. How many grams of the pencil have been used up?

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15-03-2018

well 1 decagram is 10 grams and 10×2 is 20 so 20 from 25 is 5 so 5 grams was used

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