A fish tank has 8 fishes. 1 of them have red fins and others have blue fins. How many fishes have blue fins?
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I filled a tank with 7 gallons of water. 1 gallons leaked from the tank. How many gallons of water is left in the tank?
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I have 9 dollars with me. I bought a toy car for 4 dollars. How many dollars I have left?
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Jean watered 3 of the 6 plants. How many plants still need to be watered?
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My brother lost 2 pebbles out of the 8 pebbles he collected from the river. How many pebbles are left with my brother?
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