Question
Riordan had $21.40. He bought 1 pen with a five-dollar note, 9 fifty-cent coins and 9 twenty-cent coins. How much did he have left?
2 m

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Riordan had $21.40. He bought 1 pen with a five-dollar note, 9 fifty-cent coins and 9 twenty-cent coins. How much did he have left?