Tim is 90 years old. Joanna is 26 years old. Tim is how many years older than Joanna?
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Thomas has to clean 51 windows. He has cleaned 25 of them. How many are still left to be cleaned?
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Gail watered 56 of the 59 plants. How many plants still need to be watered?
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Bill has 74 marbles. He gave 71 marbles to his dad. How many total marbles are left with Bill?
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I filled a tank with 23 gallons of water. 19 gallons leaked from the tank. How many gallons of water is left in the tank?
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