Question
PSLE
Albert had 10 more two-dollar notes than ten-dollar notes at first. He exchanged $90 worth of ten-dollar notes for two-dollar notes. How many less ten-dollar notes than two-dollar notes did Albert have after the exchange?
2 m

Click button first when a symbol is required. X

PSLE
Albert had 10 more two-dollar notes than ten-dollar notes at first. He exchanged $90 worth of ten-dollar notes for two-dollar notes. How many less ten-dollar notes than two-dollar notes did Albert have after the exchange?