Question

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?

Answer 1

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 :)

Answer 2

180 pairs of shoes.
9x20=180 cubbyholes