Question
Penelope has 22 more smoothed stones than Fiona. How many smoothed stones must Penelope give Fiona so that Penelope will have 18 more smoothed stones than Fiona?
4 m

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Penelope has 22 more smoothed stones than Fiona. How many smoothed stones must Penelope give Fiona so that Penelope will have 18 more smoothed stones than Fiona?