Question
PSLE
Andy had 11 more two-dollar notes than ten-dollar notes at first. He exchanged $70 worth of ten-dollar notes for two-dollar notes. How many less ten-dollar notes than two-dollar notes did Andy have after the exchange?
2 m

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PSLE
Andy had 11 more two-dollar notes than ten-dollar notes at first. He exchanged $70 worth of ten-dollar notes for two-dollar notes. How many less ten-dollar notes than two-dollar notes did Andy have after the exchange?