John has to clean 9 windows. He has cleaned 5 of them. How many are still left to be cleaned?
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Ray has 6 crayons. 5 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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Sanjay has 1 quarters less than Lorri. Lorri has 5 quarters. How many quarters does Sanjay have?
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Liz invited 8 friends to her birthday party. Only 7 friends came to the party. How many friends didn't came to Liz's party.
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A book costs $6.00. Jonathan has $6.00. How much more money does he need to buy the book?
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