Question

Solve the problem using the guess-and-check method. Each rack in a clothing store can hold 8 shirts. How many racks does the store need to display 96 shirts?

Answer 1

If we know the multiplication table (up to 12), we know directly the number of racks is 96/8=12.

If not, guess 10 racks = 10*8=80 shirts, too low.

Try 11 racks = 11*8=88 shirts, still too low, then

try 12 racks = 12*8=96 shirts, perfect, so 12 racks are needed.