a bowling alley keeps shoes in rows of cubbyholes. there are 9 rows of cubbyholes, with 20 cubbyholes in each row. If there is a pair of shoes in every cubbyhole, how many pairs of shoes are there?
if there's 9 rows, with 20 cubbyholes in each row, that's 9×20 = 180 cubbyholes if theres one pair of shoes in each cubbyhole, than it's 180×1 = 180 There's 180 pairs of shoes :)
