1) seven thousand five hundred twenty a) 7, 520 b) 752 2) 300,115 a) three hundred one hundred fifteen b) three hundred thousand one hundred fifteen 3) 23,500,000 a) twenty-three thousand five hundred b) twenty-three million five hundred thousand 4) six thousand four hundred a) 6,400 b) 640 5) five thousand seven hundred forty a) 5,740 b) 570,000 6) 9,999 a) nine hundred ninety nine b) nine thousand nine hundred ninety-nine 7) two thousand six hundred a) 260 b) 2,600 8) 4,000,020 a) four millions twenty thousand b) four million twenty

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