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Imagine I gave you a large bag of push pins.

This bag of push pins weighs 84.6g. 10 push pins weigh 4.7g. How many push pins are in the bag?

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itisforscience

If 10 push pins weigh 4.7g, then one push pin weighs 0.47g. Since the bag is 84.6g, calculate 84.6 ÷ 0.47 = 180 push pins. There are 180 push pins in the bag.

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