Don has to clean 6 windows. He has cleaned 5 of them. How many are still left to be cleaned?
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Joanna invited 6 friends to her birthday party. Only 4 friends came to the party. How many friends didn't came to Joanna's party.
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I filled a tank with 8 gallons of water. 5 gallons leaked from the tank. How many gallons of water is left in the tank?
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A fish tank has 7 fishes. 3 of them have red fins and others have blue fins. How many fishes have blue fins?
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Liz has to read 8 pages for her reading assignment. She read 1 pages. How many pages she has to still read?
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