Sarah had 40 marbles. She gave 15 to her friend. How many marbles does she have left?
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Mia has 14 red apples. She buys 6 more at the store. How many apples does she have now? Which operation should be used?
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Liam read 12 pages every day for 5 days. How many pages did he read in all?
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There were 25 kids on the playground. If 9 of them went inside, how many are still outside? Which operation should be used?
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