621-570

621=__ hundred+__tens+__ones

or 5 hundred + 12 tens + __ one

570=__ hundreds + __ tens+__ones

I need the answer to this problem. For math 4 (2x-6)

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Kim has stamps only from the U. S. and France in her collection. She has 4 times as many stamps from the U. S. as France. Which is an expression for the number of stamps in her collection using f for the number of stamps from France? f 4 + f 4f 5f

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