Joanna invited 7 friends to her birthday party. Only 2 friends came to the party. How many friends didn't came to Joanna's party.
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Karen has to read 6 pages for her reading assignment. She read 4 pages. How many pages she has to still read?
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Sanjay has 5 crayons. 2 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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Ray is 9 years old. Joanna is 4 years old. Ray is how many years older than Joanna?
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A fish tank has 9 fishes. 3 of them have red fins and others have blue fins. How many fishes have blue fins?
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