I filled a tank with 75 gallons of water. 21 gallons leaked from the tank. How many gallons of water is left in the tank?
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Joanna invited 28 friends to her birthday party. Only 20 friends came to the party. How many friends didn't came to Joanna's party.
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There are 69 cookies in a plate. 38 kids took one cookie each from the plate. How many cookies are left in the plate?
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My brother lost 2 pebbles out of the 40 pebbles he collected from the river. How many pebbles are left with my brother?
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Shrey has to clean 11 windows. He has cleaned 8 of them. How many are still left to be cleaned?
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