Mike has 5 quarters less than Tracy. Tracy has 9 quarters. How many quarters does Mike have?
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Tim has 7 crayons. 4 of them are in the green box and the others are in the red box. How many crayons are in the red box?
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George has to clean 8 windows. He has cleaned 7 of them. How many are still left to be cleaned?
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A fish tank has 9 fishes. 2 of them have red fins and others have blue fins. How many fishes have blue fins?
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Liz watered 3 of the 8 plants. How many plants still need to be watered?
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