Question
PSLE
Eric had 20 more one-dollar notes than ten-dollar notes at first. He exchanged $70 worth of ten-dollar notes for one-dollar notes. How many less ten-dollar notes than one-dollar notes did Eric have after the exchange?
2 m

Click button first when a symbol is required. X

PSLE
Eric had 20 more one-dollar notes than ten-dollar notes at first. He exchanged $70 worth of ten-dollar notes for one-dollar notes. How many less ten-dollar notes than one-dollar notes did Eric have after the exchange?